#3iatlas — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #3iatlas, aggregated by home.social.
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2026-09-09 00:00:00 UTC (Delta: 2026-09-08)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.35 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 229 days🌎 Relative to Earth
- Distance (km): 1,731,218,288.47 km (+2,823,021.13 km)
- Distance (AU): 11.57 (+0.02)
- Light travel time: 1 h 36 min 14.72 s (+9.42 s) -
Concerning 3I/ATLAS. a conversation with AI.
#TruthWarriors #3I/ATLAS:
ME: "in my view, it is a craft. a huge craft. it makes sense that it uses what is seen as out-gassing as a way of maneuvering. it makes sense that crafts from other worlds would include using the physical matter.
1/ -
Concerning 3I/ATLAS. a conversation with AI.
#TruthWarriors #3I/ATLAS:
ME: "in my view, it is a craft. a huge craft. it makes sense that it uses what is seen as out-gassing as a way of maneuvering. it makes sense that crafts from other worlds would include using the physical matter.
1/ -
Concerning 3I/ATLAS. a conversation with AI.
#TruthWarriors #3I/ATLAS:
ME: "in my view, it is a craft. a huge craft. it makes sense that it uses what is seen as out-gassing as a way of maneuvering. it makes sense that crafts from other worlds would include using the physical matter.
1/ -
2026-09-08 00:00:00 UTC (Delta: 2026-09-07)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.35 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 230 days🌎 Relative to Earth
- Distance (km): 1,728,395,267.34 km (+2,847,006.12 km)
- Distance (AU): 11.55 (+0.02)
- Light travel time: 1 h 36 min 5.31 s (+9.50 s) -
2026-09-08 00:00:00 UTC (Delta: 2026-09-07)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.35 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 230 days🌎 Relative to Earth
- Distance (km): 1,728,395,267.34 km (+2,847,006.12 km)
- Distance (AU): 11.55 (+0.02)
- Light travel time: 1 h 36 min 5.31 s (+9.50 s) -
2026-09-08 00:00:00 UTC (Delta: 2026-09-07)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.35 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 230 days🌎 Relative to Earth
- Distance (km): 1,728,395,267.34 km (+2,847,006.12 km)
- Distance (AU): 11.55 (+0.02)
- Light travel time: 1 h 36 min 5.31 s (+9.50 s) -
2026-09-08 00:00:00 UTC (Delta: 2026-09-07)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.35 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 230 days🌎 Relative to Earth
- Distance (km): 1,728,395,267.34 km (+2,847,006.12 km)
- Distance (AU): 11.55 (+0.02)
- Light travel time: 1 h 36 min 5.31 s (+9.50 s) -
2026-09-08 00:00:00 UTC (Delta: 2026-09-07)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.35 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 230 days🌎 Relative to Earth
- Distance (km): 1,728,395,267.34 km (+2,847,006.12 km)
- Distance (AU): 11.55 (+0.02)
- Light travel time: 1 h 36 min 5.31 s (+9.50 s) -
Hello @[email protected] #EPSC2026 here in Den Haag! Looking forward the #3I/Atlas keynote today, plus I will be presenting some @[email protected] related-work in the small body dynamics session SB12 later, and I also have another talk Thurs. Gonna be a busy week! #PlanetSci
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Hello @[email protected] #EPSC2026 here in Den Haag! Looking forward the #3I/Atlas keynote today, plus I will be presenting some @[email protected] related-work in the small body dynamics session SB12 later, and I also have another talk Thurs. Gonna be a busy week! #PlanetSci
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Hello @[email protected] #EPSC2026 here in Den Haag! Looking forward the #3I/Atlas keynote today, plus I will be presenting some @[email protected] related-work in the small body dynamics session SB12 later, and I also have another talk Thurs. Gonna be a busy week! #PlanetSci
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Hello @[email protected] #EPSC2026 here in Den Haag! Looking forward the #3I/Atlas keynote today, plus I will be presenting some @[email protected] related-work in the small body dynamics session SB12 later, and I also have another talk Thurs. Gonna be a busy week! #PlanetSci
-
Hello @[email protected] #EPSC2026 here in Den Haag! Looking forward the #3I/Atlas keynote today, plus I will be presenting some @[email protected] related-work in the small body dynamics session SB12 later, and I also have another talk Thurs. Gonna be a busy week! #PlanetSci
-
2026-09-07 00:00:00 UTC (Delta: 2026-09-06)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.36 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 231 days🌎 Relative to Earth
- Distance (km): 1,725,548,261.22 km (+2,871,595.04 km)
- Distance (AU): 11.53 (+0.02)
- Light travel time: 1 h 35 min 55.81 s (+9.58 s) -
2026-09-07 00:00:00 UTC (Delta: 2026-09-06)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.36 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 231 days🌎 Relative to Earth
- Distance (km): 1,725,548,261.22 km (+2,871,595.04 km)
- Distance (AU): 11.53 (+0.02)
- Light travel time: 1 h 35 min 55.81 s (+9.58 s) -
2026-09-07 00:00:00 UTC (Delta: 2026-09-06)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.36 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 231 days🌎 Relative to Earth
- Distance (km): 1,725,548,261.22 km (+2,871,595.04 km)
- Distance (AU): 11.53 (+0.02)
- Light travel time: 1 h 35 min 55.81 s (+9.58 s) -
2026-09-07 00:00:00 UTC (Delta: 2026-09-06)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.36 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 231 days🌎 Relative to Earth
- Distance (km): 1,725,548,261.22 km (+2,871,595.04 km)
- Distance (AU): 11.53 (+0.02)
- Light travel time: 1 h 35 min 55.81 s (+9.58 s) -
2026-09-07 00:00:00 UTC (Delta: 2026-09-06)
INTERSTELLAR VISITOR: 3I/ATLAS
- Barycentric speed: 59.36 km/s (-0.00 km/s)
- Crossing Uranus's orbit in: 231 days🌎 Relative to Earth
- Distance (km): 1,725,548,261.22 km (+2,871,595.04 km)
- Distance (AU): 11.53 (+0.02)
- Light travel time: 1 h 35 min 55.81 s (+9.58 s) -
The Angry Astronaut
@angryastro.bsky.social
Deep in intergalactic space, in the vicinity of the Large Magellanic Cloud, there's a star that's going impossibly fast.
At over 3,000 km per second, it could travel from Earth to PLUTO in less than 20 days!
And it's not the only one.
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Weekly Update from the Open Journal of Astrophysics 18/07/2026
It’s time once more for another Saturday update of activity at the Open Journal of Astrophysics. Since the last update we have published a further six papers, bringing the number in Volume 9 (2026) to 151 and the total so far published by OJAp up to 599.
I will continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.
The first paper to report this week, published on Tuesday 14th July, is “On combining estimated and analytic covariance matrices” by Alan Heavens (Imperial College London, UK), Lorne Whiteway (University College, London, UK) and Elena Sellentin (Leiden University, The Netherlands). This article, published in the folder Cosmology and Nongalactic Astrophysics, presents an accurate approximation for the combined likelihood function in cosmological data analysis, improving upon previous methods by better representing the heavy tails of the true distribution.
The overlay for this paper is here
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116916991519124229
The second paper for this week, also published on Tuesday 14th July in the folder Cosmology and Nongalactic Astrophysics is: “Line-of-sight shear in SLACS strong lenses II: validation tests with an extended sample” by Natalie B. Hogg (U. Cambridge, UK), Daniel P. Johnson (Université de Montpellier, France), Anowar J. Shajib (U. Chicago, USA) and Julien Larena (Montpellier). The study described in this paper models 27 additional gravitational lenses, finding a significant fraction with unexpectedly large line-of-sight shears. Factors like redshift, filter, and signal-to-noise ratio don’t significantly affect shear magnitudes.
The overlay looks like this:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116917026598474399
The third paper of the week, published on Wednesday 15th July, again in the folder Cosmology and Nongalactic Astrophysics “Investigating the Dark Energy Constraint from Strongly Lensed AGN at LSST-Scale” by Sydney Erickson (Stanford University, USA) and 13 others on behalf of The LSST Dark Energy Science Collaboration. The study uses a new technique to analyze a large sample of lensed Active Galactic Nuclei, providing an independent probe of dark energy and improving constraints on the Universe’s expansion.
The overlay for this one is here:
The final, accepted version can be found on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116922734297811558
The fourth paper of the week, also published on Wednesday 15th July but in the folder Earth and Planetary Astrophysics is “University of Hawaii 88-inch Telescope Observations of the Interstellar Comet 3I/ATLAS: Spectrophotometric Blue-Sensitive Spectral Time Series Spanning Two Months from Discovery” by W. B. Hoogendam (University of Hawaii, USA) and 24 others from around the world. The study presents observations of the third interstellar object, 3I/ATLAS, using the SuperNova Integral Field Spectrograph, revealing its properties and comparing it to bodies in our solar system.
The overlay for this one is here:
You can read the final version of this one on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116925616134490970
The fifth paper of the week, published on Friday 17th July in the folder Astrophysics of Galaxies, is “The birth of the intracluster medium: the evolution of multiphase gas and Lyman-α haloes in a z~3 simulated protocluster” by Jake S. Bennett (Harvard Smithsonian CfA, USA), Aaron Smith (U. Nottingham, UK), Fabrizio Arrigoni-Battaia (MPA Garching, Germany), Debora Sijacki (U. Cambridge, UK) , Cassandra Lochhaas (CfA) and Lars Hernquist (CfA). This study uses a cosmological simulation to explore the transition from complex galactic haloes to mature galaxy clusters, focusing on gas distribution, ionisation, and emission changes during this evolution.
The overlay for this one is here:
You can read the final version of this one on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116934117289387295
The sixth and final paper of this week is “Density reconstruction from biased tracers: Testing the equivalence principle through consistency relations” by Lawrence Dam and Omar Darwish (Université de Genève, Switzerland). This was published on Friday 17th July in the folder Cosmology and Nongalactic Astrophysics. It proposes using quadratic estimators to test the weak equivalence principle on cosmological scales, offering a practical alternative to the conventional bispectrum approach.
The overlay for this one is here:
You can find the final accepted version on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116934191977670070
As you can see we have now published over 150 papers this year and are just one shy of 600 in total. I expect we’ll pass that milestone next week. I’ll do another update next Saturday.
#3IAtlas #ActiveGalacticNuclei #arXiv251013803v2 #arXiv251113669v3 #arXiv251205050v2 #arXiv251209020v2 #arXiv260316991v2 #arXiv260419463v2 #AstrophysicsOfGalaxies #biasedGalaxyFormation #CircumgalacticMedium #cosmologicalParameters #cosmologicalSimulations #Cosmology #CosmologyAndNonGalacticAstrophysics #covarianceMatrices #DarkEnergySpectroscopicInstrument #DensityReconstruction #DESI #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #equivalencePrinciple #galaxyClusters #galaxyHaloes #interstellarComets #lineOfSightShear #LSSTDarkEnergyScienceCollaboration #LymanAlpha #OpenAccess #OpenAccessPublishing #protoclusters #SLACS #statisticalCosmology #strongGravitationalLensing -
Weekly Update from the Open Journal of Astrophysics 18/07/2026
It’s time once more for another Saturday update of activity at the Open Journal of Astrophysics. Since the last update we have published a further six papers, bringing the number in Volume 9 (2026) to 151 and the total so far published by OJAp up to 599.
I will continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.
The first paper to report this week, published on Tuesday 14th July, is “On combining estimated and analytic covariance matrices” by Alan Heavens (Imperial College London, UK), Lorne Whiteway (University College, London, UK) and Elena Sellentin (Leiden University, The Netherlands). This article, published in the folder Cosmology and Nongalactic Astrophysics, presents an accurate approximation for the combined likelihood function in cosmological data analysis, improving upon previous methods by better representing the heavy tails of the true distribution.
The overlay for this paper is here
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116916991519124229
The second paper for this week, also published on Tuesday 14th July in the folder Cosmology and Nongalactic Astrophysics is: “Line-of-sight shear in SLACS strong lenses II: validation tests with an extended sample” by Natalie B. Hogg (U. Cambridge, UK), Daniel P. Johnson (Université de Montpellier, France), Anowar J. Shajib (U. Chicago, USA) and Julien Larena (Montpellier). The study described in this paper models 27 additional gravitational lenses, finding a significant fraction with unexpectedly large line-of-sight shears. Factors like redshift, filter, and signal-to-noise ratio don’t significantly affect shear magnitudes.
The overlay looks like this:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116917026598474399
The third paper of the week, published on Wednesday 15th July, again in the folder Cosmology and Nongalactic Astrophysics “Investigating the Dark Energy Constraint from Strongly Lensed AGN at LSST-Scale” by Sydney Erickson (Stanford University, USA) and 13 others on behalf of The LSST Dark Energy Science Collaboration. The study uses a new technique to analyze a large sample of lensed Active Galactic Nuclei, providing an independent probe of dark energy and improving constraints on the Universe’s expansion.
The overlay for this one is here:
The final, accepted version can be found on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116922734297811558
The fourth paper of the week, also published on Wednesday 15th July but in the folder Earth and Planetary Astrophysics is “University of Hawaii 88-inch Telescope Observations of the Interstellar Comet 3I/ATLAS: Spectrophotometric Blue-Sensitive Spectral Time Series Spanning Two Months from Discovery” by W. B. Hoogendam (University of Hawaii, USA) and 24 others from around the world. The study presents observations of the third interstellar object, 3I/ATLAS, using the SuperNova Integral Field Spectrograph, revealing its properties and comparing it to bodies in our solar system.
The overlay for this one is here:
You can read the final version of this one on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116925616134490970
The fifth paper of the week, published on Friday 17th July in the folder Astrophysics of Galaxies, is “The birth of the intracluster medium: the evolution of multiphase gas and Lyman-α haloes in a z~3 simulated protocluster” by Jake S. Bennett (Harvard Smithsonian CfA, USA), Aaron Smith (U. Nottingham, UK), Fabrizio Arrigoni-Battaia (MPA Garching, Germany), Debora Sijacki (U. Cambridge, UK) , Cassandra Lochhaas (CfA) and Lars Hernquist (CfA). This study uses a cosmological simulation to explore the transition from complex galactic haloes to mature galaxy clusters, focusing on gas distribution, ionisation, and emission changes during this evolution.
The overlay for this one is here:
You can read the final version of this one on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116934117289387295
The sixth and final paper of this week is “Density reconstruction from biased tracers: Testing the equivalence principle through consistency relations” by Lawrence Dam and Omar Darwish (Université de Genève, Switzerland). This was published on Friday 17th July in the folder Cosmology and Nongalactic Astrophysics. It proposes using quadratic estimators to test the weak equivalence principle on cosmological scales, offering a practical alternative to the conventional bispectrum approach.
The overlay for this one is here:
You can find the final accepted version on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116934191977670070
As you can see we have now published over 150 papers this year and are just one shy of 600 in total. I expect we’ll pass that milestone next week. I’ll do another update next Saturday.
#3IAtlas #ActiveGalacticNuclei #arXiv251013803v2 #arXiv251113669v3 #arXiv251205050v2 #arXiv251209020v2 #arXiv260316991v2 #arXiv260419463v2 #AstrophysicsOfGalaxies #biasedGalaxyFormation #CircumgalacticMedium #cosmologicalParameters #cosmologicalSimulations #Cosmology #CosmologyAndNonGalacticAstrophysics #covarianceMatrices #DarkEnergySpectroscopicInstrument #DensityReconstruction #DESI #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #equivalencePrinciple #galaxyClusters #galaxyHaloes #interstellarComets #lineOfSightShear #LSSTDarkEnergyScienceCollaboration #LymanAlpha #OpenAccess #OpenAccessPublishing #protoclusters #SLACS #statisticalCosmology #strongGravitationalLensing -
Weekly Update from the Open Journal of Astrophysics 18/07/2026
It’s time once more for another Saturday update of activity at the Open Journal of Astrophysics. Since the last update we have published a further six papers, bringing the number in Volume 9 (2026) to 151 and the total so far published by OJAp up to 599.
I will continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.
The first paper to report this week, published on Tuesday 14th July, is “On combining estimated and analytic covariance matrices” by Alan Heavens (Imperial College London, UK), Lorne Whiteway (University College, London, UK) and Elena Sellentin (Leiden University, The Netherlands). This article, published in the folder Cosmology and Nongalactic Astrophysics, presents an accurate approximation for the combined likelihood function in cosmological data analysis, improving upon previous methods by better representing the heavy tails of the true distribution.
The overlay for this paper is here
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116916991519124229
The second paper for this week, also published on Tuesday 14th July in the folder Cosmology and Nongalactic Astrophysics is: “Line-of-sight shear in SLACS strong lenses II: validation tests with an extended sample” by Natalie B. Hogg (U. Cambridge, UK), Daniel P. Johnson (Université de Montpellier, France), Anowar J. Shajib (U. Chicago, USA) and Julien Larena (Montpellier). The study described in this paper models 27 additional gravitational lenses, finding a significant fraction with unexpectedly large line-of-sight shears. Factors like redshift, filter, and signal-to-noise ratio don’t significantly affect shear magnitudes.
The overlay looks like this:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116917026598474399
The third paper of the week, published on Wednesday 15th July, again in the folder Cosmology and Nongalactic Astrophysics “Investigating the Dark Energy Constraint from Strongly Lensed AGN at LSST-Scale” by Sydney Erickson (Stanford University, USA) and 13 others on behalf of The LSST Dark Energy Science Collaboration. The study uses a new technique to analyze a large sample of lensed Active Galactic Nuclei, providing an independent probe of dark energy and improving constraints on the Universe’s expansion.
The overlay for this one is here:
The final, accepted version can be found on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116922734297811558
The fourth paper of the week, also published on Wednesday 15th July but in the folder Earth and Planetary Astrophysics is “University of Hawaii 88-inch Telescope Observations of the Interstellar Comet 3I/ATLAS: Spectrophotometric Blue-Sensitive Spectral Time Series Spanning Two Months from Discovery” by W. B. Hoogendam (University of Hawaii, USA) and 24 others from around the world. The study presents observations of the third interstellar object, 3I/ATLAS, using the SuperNova Integral Field Spectrograph, revealing its properties and comparing it to bodies in our solar system.
The overlay for this one is here:
You can read the final version of this one on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116925616134490970
The fifth paper of the week, published on Friday 17th July in the folder Astrophysics of Galaxies, is “The birth of the intracluster medium: the evolution of multiphase gas and Lyman-α haloes in a z~3 simulated protocluster” by Jake S. Bennett (Harvard Smithsonian CfA, USA), Aaron Smith (U. Nottingham, UK), Fabrizio Arrigoni-Battaia (MPA Garching, Germany), Debora Sijacki (U. Cambridge, UK) , Cassandra Lochhaas (CfA) and Lars Hernquist (CfA). This study uses a cosmological simulation to explore the transition from complex galactic haloes to mature galaxy clusters, focusing on gas distribution, ionisation, and emission changes during this evolution.
The overlay for this one is here:
You can read the final version of this one on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116934117289387295
The sixth and final paper of this week is “Density reconstruction from biased tracers: Testing the equivalence principle through consistency relations” by Lawrence Dam and Omar Darwish (Université de Genève, Switzerland). This was published on Friday 17th July in the folder Cosmology and Nongalactic Astrophysics. It proposes using quadratic estimators to test the weak equivalence principle on cosmological scales, offering a practical alternative to the conventional bispectrum approach.
The overlay for this one is here:
You can find the final accepted version on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116934191977670070
As you can see we have now published over 150 papers this year and are just one shy of 600 in total. I expect we’ll pass that milestone next week. I’ll do another update next Saturday.
#3IAtlas #ActiveGalacticNuclei #arXiv251013803v2 #arXiv251113669v3 #arXiv251205050v2 #arXiv251209020v2 #arXiv260316991v2 #arXiv260419463v2 #AstrophysicsOfGalaxies #biasedGalaxyFormation #CircumgalacticMedium #cosmologicalParameters #cosmologicalSimulations #Cosmology #CosmologyAndNonGalacticAstrophysics #covarianceMatrices #DarkEnergySpectroscopicInstrument #DensityReconstruction #DESI #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #equivalencePrinciple #galaxyClusters #galaxyHaloes #interstellarComets #lineOfSightShear #LSSTDarkEnergyScienceCollaboration #LymanAlpha #OpenAccess #OpenAccessPublishing #protoclusters #SLACS #statisticalCosmology #strongGravitationalLensing -
Weekly Update from the Open Journal of Astrophysics 18/07/2026
It’s time once more for another Saturday update of activity at the Open Journal of Astrophysics. Since the last update we have published a further six papers, bringing the number in Volume 9 (2026) to 151 and the total so far published by OJAp up to 599.
I will continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.
The first paper to report this week, published on Tuesday 14th July, is “On combining estimated and analytic covariance matrices” by Alan Heavens (Imperial College London, UK), Lorne Whiteway (University College, London, UK) and Elena Sellentin (Leiden University, The Netherlands). This article, published in the folder Cosmology and Nongalactic Astrophysics, presents an accurate approximation for the combined likelihood function in cosmological data analysis, improving upon previous methods by better representing the heavy tails of the true distribution.
The overlay for this paper is here
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116916991519124229
The second paper for this week, also published on Tuesday 14th July in the folder Cosmology and Nongalactic Astrophysics is: “Line-of-sight shear in SLACS strong lenses II: validation tests with an extended sample” by Natalie B. Hogg (U. Cambridge, UK), Daniel P. Johnson (Université de Montpellier, France), Anowar J. Shajib (U. Chicago, USA) and Julien Larena (Montpellier). The study described in this paper models 27 additional gravitational lenses, finding a significant fraction with unexpectedly large line-of-sight shears. Factors like redshift, filter, and signal-to-noise ratio don’t significantly affect shear magnitudes.
The overlay looks like this:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116917026598474399
The third paper of the week, published on Wednesday 15th July, again in the folder Cosmology and Nongalactic Astrophysics “Investigating the Dark Energy Constraint from Strongly Lensed AGN at LSST-Scale” by Sydney Erickson (Stanford University, USA) and 13 others on behalf of The LSST Dark Energy Science Collaboration. The study uses a new technique to analyze a large sample of lensed Active Galactic Nuclei, providing an independent probe of dark energy and improving constraints on the Universe’s expansion.
The overlay for this one is here:
The final, accepted version can be found on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116922734297811558
The fourth paper of the week, also published on Wednesday 15th July but in the folder Earth and Planetary Astrophysics is “University of Hawaii 88-inch Telescope Observations of the Interstellar Comet 3I/ATLAS: Spectrophotometric Blue-Sensitive Spectral Time Series Spanning Two Months from Discovery” by W. B. Hoogendam (University of Hawaii, USA) and 24 others from around the world. The study presents observations of the third interstellar object, 3I/ATLAS, using the SuperNova Integral Field Spectrograph, revealing its properties and comparing it to bodies in our solar system.
The overlay for this one is here:
You can read the final version of this one on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116925616134490970
The fifth paper of the week, published on Friday 17th July in the folder Astrophysics of Galaxies, is “The birth of the intracluster medium: the evolution of multiphase gas and Lyman-α haloes in a z~3 simulated protocluster” by Jake S. Bennett (Harvard Smithsonian CfA, USA), Aaron Smith (U. Nottingham, UK), Fabrizio Arrigoni-Battaia (MPA Garching, Germany), Debora Sijacki (U. Cambridge, UK) , Cassandra Lochhaas (CfA) and Lars Hernquist (CfA). This study uses a cosmological simulation to explore the transition from complex galactic haloes to mature galaxy clusters, focusing on gas distribution, ionisation, and emission changes during this evolution.
The overlay for this one is here:
You can read the final version of this one on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116934117289387295
The sixth and final paper of this week is “Density reconstruction from biased tracers: Testing the equivalence principle through consistency relations” by Lawrence Dam and Omar Darwish (Université de Genève, Switzerland). This was published on Friday 17th July in the folder Cosmology and Nongalactic Astrophysics. It proposes using quadratic estimators to test the weak equivalence principle on cosmological scales, offering a practical alternative to the conventional bispectrum approach.
The overlay for this one is here:
You can find the final accepted version on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116934191977670070
As you can see we have now published over 150 papers this year and are just one shy of 600 in total. I expect we’ll pass that milestone next week. I’ll do another update next Saturday.
#3IAtlas #ActiveGalacticNuclei #arXiv251013803v2 #arXiv251113669v3 #arXiv251205050v2 #arXiv251209020v2 #arXiv260316991v2 #arXiv260419463v2 #AstrophysicsOfGalaxies #biasedGalaxyFormation #CircumgalacticMedium #cosmologicalParameters #cosmologicalSimulations #Cosmology #CosmologyAndNonGalacticAstrophysics #covarianceMatrices #DarkEnergySpectroscopicInstrument #DensityReconstruction #DESI #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #equivalencePrinciple #galaxyClusters #galaxyHaloes #interstellarComets #lineOfSightShear #LSSTDarkEnergyScienceCollaboration #LymanAlpha #OpenAccess #OpenAccessPublishing #protoclusters #SLACS #statisticalCosmology #strongGravitationalLensing -
Weekly Update from the Open Journal of Astrophysics 18/07/2026
It’s time once more for another Saturday update of activity at the Open Journal of Astrophysics. Since the last update we have published a further six papers, bringing the number in Volume 9 (2026) to 151 and the total so far published by OJAp up to 599.
I will continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.
The first paper to report this week, published on Tuesday 14th July, is “On combining estimated and analytic covariance matrices” by Alan Heavens (Imperial College London, UK), Lorne Whiteway (University College, London, UK) and Elena Sellentin (Leiden University, The Netherlands). This article, published in the folder Cosmology and Nongalactic Astrophysics, presents an accurate approximation for the combined likelihood function in cosmological data analysis, improving upon previous methods by better representing the heavy tails of the true distribution.
The overlay for this paper is here
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116916991519124229
The second paper for this week, also published on Tuesday 14th July in the folder Cosmology and Nongalactic Astrophysics is: “Line-of-sight shear in SLACS strong lenses II: validation tests with an extended sample” by Natalie B. Hogg (U. Cambridge, UK), Daniel P. Johnson (Université de Montpellier, France), Anowar J. Shajib (U. Chicago, USA) and Julien Larena (Montpellier). The study described in this paper models 27 additional gravitational lenses, finding a significant fraction with unexpectedly large line-of-sight shears. Factors like redshift, filter, and signal-to-noise ratio don’t significantly affect shear magnitudes.
The overlay looks like this:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116917026598474399
The third paper of the week, published on Wednesday 15th July, again in the folder Cosmology and Nongalactic Astrophysics “Investigating the Dark Energy Constraint from Strongly Lensed AGN at LSST-Scale” by Sydney Erickson (Stanford University, USA) and 13 others on behalf of The LSST Dark Energy Science Collaboration. The study uses a new technique to analyze a large sample of lensed Active Galactic Nuclei, providing an independent probe of dark energy and improving constraints on the Universe’s expansion.
The overlay for this one is here:
The final, accepted version can be found on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116922734297811558
The fourth paper of the week, also published on Wednesday 15th July but in the folder Earth and Planetary Astrophysics is “University of Hawaii 88-inch Telescope Observations of the Interstellar Comet 3I/ATLAS: Spectrophotometric Blue-Sensitive Spectral Time Series Spanning Two Months from Discovery” by W. B. Hoogendam (University of Hawaii, USA) and 24 others from around the world. The study presents observations of the third interstellar object, 3I/ATLAS, using the SuperNova Integral Field Spectrograph, revealing its properties and comparing it to bodies in our solar system.
The overlay for this one is here:
You can read the final version of this one on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116925616134490970
The fifth paper of the week, published on Friday 17th July in the folder Astrophysics of Galaxies, is “The birth of the intracluster medium: the evolution of multiphase gas and Lyman-α haloes in a z~3 simulated protocluster” by Jake S. Bennett (Harvard Smithsonian CfA, USA), Aaron Smith (U. Nottingham, UK), Fabrizio Arrigoni-Battaia (MPA Garching, Germany), Debora Sijacki (U. Cambridge, UK) , Cassandra Lochhaas (CfA) and Lars Hernquist (CfA). This study uses a cosmological simulation to explore the transition from complex galactic haloes to mature galaxy clusters, focusing on gas distribution, ionisation, and emission changes during this evolution.
The overlay for this one is here:
You can read the final version of this one on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116934117289387295
The sixth and final paper paper of this week is “”Density reconstruction from biased tracers: Testing the equivalence principle through consistency relations” by Lawrence Dam and Omar Darwish (Université de Genève, Switzerland). This was published on Friday 17th July in the folder Cosmology and Nongalactic Astrophysics. It proposes using quadratic estimators to test the weak equivalence principle on cosmological scales, offering a practical alternative to the conventional bispectrum approach.
The overlay for this one is here:
You can find the final accepted version on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116934191977670070
As you can see we have now published over 150 papers this year and are just one shy of 600 in total. I expect we’ll pass that milestone next week. I’ll do another update next Saturday.
#3IAtlas #ActiveGalacticNuclei #arXiv251013803v2 #arXiv251113669v3 #arXiv251205050v2 #arXiv251209020v2 #arXiv260316991v2 #arXiv260419463v2 #AstrophysicsOfGalaxies #biasedGalaxyFormation #CircumgalacticMedium #cosmologicalParameters #cosmologicalSimulations #Cosmology #CosmologyAndNonGalacticAstrophysics #covarianceMatrices #DarkEnergySpectroscopicInstrument #DensityReconstruction #DESI #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #equivalencePrinciple #galaxyClusters #galaxyHaloes #interstellarComets #lineOfSightShear #LSSTDarkEnergyScienceCollaboration #LymanAlpha #OpenAccess #OpenAccessPublishing #protoclusters #SLACS #statisticalCosmology #strongGravitationalLensing -
#ESO:
"
Älter als die Sonne: Astronomen finden neue Hinweise auf den Ursprung des interstellaren Kometen 3I/ATLAS
"
".. VLT .. genutzt, um .. Zusammensetzung v. 3I/ATLAS, d. hellsten jemals beobachteten interstell. Objekt, im Detail zu untersuchen... fanden .. heraus, dass 3I/ATLAS wahrscheinl. aus d. Außenbereichen eines alten Sternensystems stammt. .. .. mehr als doppelt so alt wie d. Sonne .."https://www.eso.org/public/germany/news/eso2608/
6.7.2026
#3IATLAS #Astronomie #Deuterium #Kohlenstoff #Komet #UVES #VLT
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3I/ATLAS compared to Solar System comets ☄️
#3iatlas #canadianspaceagency #comet #comet3iatlas #cosmos #csa #esa #esawebb
▶️ 1 new picture from ESA (Flickr) https://commons.wikimedia.org/wiki/File:3I-ATLAS_compared_to_Solar_System_comets_%2855354903825%29.jpg
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https://www.europesays.com/es/620688/ El visitante 3I/ATLAS nació hace 12.000 millones de años en un rincón helado de la galaxia #12000 #3iatlas #anos #Ciencia #CienciaYTecnología #CienciaYtecnología #ES #España #galaxia #Helado #millones #nacio #rincon #Science #ScienceAndTechnology #ScienceAndTechnology #Spain #Technology #Tecnología #visitante
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#DerStandard:
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Der interstellare Komet 3I/Atlas stammt aus einem völlig andersartigen System
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"Der dritte interstellare Besucher in unserem Sonnensystem liefert neue Überraschungen. Seine Zusammensetzung unterscheidet sich von allen bekannten Kometen"23.4.2026
#3IAtlas #Astronomie #Astrophysik #Deuterium #Komet #Milchstraße #Sonnensystem
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https://lweb.cfa.harvard.edu/~loeb/TA2.pdf
A new paper laying out the HARD DATA of the three #3iatlas jets...each one almost exactly at 120 degrees apart as you would find on a vehicle not a comet, which this one definitely is not as NASA will go to extraordinary lengths to convince everyone it's just a comet.
+ This is a trisymmetric configuration - optimal for omnidirectional attitude control
+ Provides redundancy: any two jets can control all three rotation axes
+ The 120° spacing gives balanced torque authority without dead zones
In addition,there is a large thruster pointing towards the sun (which is what main propulsion would do), sorry "outgassing", comets never do this. When they do, it's an optical illusion.
And because we now accept anomalies without blinking an eye, all three jets changed shape to fan, as if they thrusters up or changed nozzle geometry...
Throw that one atop the #anomaly pile...
#aliens #astronomy #space #comet #comet3iatlas -
Friday is the closest approach to Earth of 3IAtlas. We all know what's happening on the captain's bridge.
"Mr. ZnBorak. Have you intercepted their communications yet?"
"I have, sir."
"Summarize, please."
"We should get the hell out of here."
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3I/ATLAS üç gün sonra dünyaya en yakın konumunda olacak!: Güneş Sistemimizin dışından gelen ve "yıldızlararası" olarak adlandırılan 3I/ATLAS kuyruklu yıldızı, 19 Aralık'ta Dünya'ya en çok yaklaştığı noktadan geçecek. Bilim insanları, bu güvenli geçiş sayesinde, başka yıldızların etrafındaki gezegenlerin nasıl oluştuğuna dair önemli ipuçları yakalamayı hedefliyor. Yıldızlararası kuyruklu… https://www.eshahaber.com.tr/haber/3?-atlas-uc-gun-sonra-dunyaya-en-yakin-konumunda-olacak-279896.html&utm_source=dlvr.it&utm_medium=mastodon EshaHaber.com.tr #3IATLAS #Yıldızlararası #KuyrukluYıldız #Astronomi #NASA
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3I/ATLAS: Japan’s XRISM Probe Captures X-ray Emission From Exocomet Ahead Of Earth Flyby
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Hubble reobserves 3I/ATLAS ☄️✨
#3iatlas #comet #comet3iatlas #cosmos #creativecommons #esa #europeanspaceagency #galaxy
▶️ 1 new picture from ESA (Flickr) https://commons.wikimedia.org/wiki/File:Hubble_reobserves_3I-ATLAS_%2854965225024%29.jpg
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NASA doğruladı! Renk değiştirmişti: 3I ATLAS, şimdi de olağan dışı hızlandı!: Astronomlar, Güneş’in arkasında hareket eden yıldızlararası cisim 3I/ATLAS’ta olağan dışı bir değişim gözlemledi. NASA ve Avrupa Uzay Ajansı’na (ESA) bağlı gözlemevlerinden elde edilen veriler, cismin bir kez daha renk değiştirmesinin ardından yerçekimi dışı bir hızlanma sergilediğini ortaya koydu.
3I/ATLAS, Temmuz ayında… https://www.eshahaber.com.tr/haber/nasa-dogruladi-renk-degistirmisti-3?-atlas-simdi-de-olagan-disi-hizlandi-269641.html&utm_source=dlvr.it&utm_medium=mastodon EshaHaber.com.tr #NASA #Astronomi #Uzay #GüneşSistemi #3IATLAS