#gravitationallensing — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #gravitationallensing, aggregated by home.social.
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https://www.europesays.com/ie/480412/ Microlensing Event at OGLE-2013-BLG-0341 (Hubble Image) #Éire #GravitationalLensing #HubbleSpaceTelescope #IE #Ireland #NancyGraceRomanSpaceTelescope #Science #Space #stars #TheMilkyWay
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Hubble Survey Sets Up Roman’s Future Look Near Milky Way’s Center
This VISTA VVV Survey image shows the galactic bulge near Sagittarius A*, the supermassive black hole at the…
#NewsBeep #News #Space #Astrophysics #AstrophysicsDivision #CA #Canada #Exoplanets #GoddardSpaceFlightCenter #gravitationallensing #HubbleSpaceTelescope #NancyGraceRomanSpaceTelescope #Science #Stars #TheMilkyWay
https://www.newsbeep.com/ca/662536/ -
Hubble Survey Sets Up Roman’s Future Look Near Milky Way’s Center
This VISTA VVV Survey image shows the galactic bulge near Sagittarius A*, the supermassive black hole at the…
#NewsBeep #News #Space #Astrophysics #AstrophysicsDivision #exoplanets #GoddardSpaceFlightCenter #gravitationallensing #HubbleSpaceTelescope #NancyGraceRomanSpaceTelescope #Science #stars #TheMilkyWay #UK #UnitedKingdom
https://www.newsbeep.com/uk/578250/ -
Would you like to be part of citizen science astronomy? We invite you to classify gravitational lens candidates in so-far unreleased #ESAEuclid data: "Space Warps – ESA Euclid DR1".
3000 volunteers have already made nearly 900,000 classifications, yet 70% of the project are still to be done.
All the background and link to the Zooniverse: https://www.zooniverse.org/projects/aprajita/space-warps-esa-euclid
#ESA #Euclid #astronomy #GravitationalLensing #science #CitizenScience.
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Would you like to be part of citizen science astronomy? We invite you to classify gravitational lens candidates in so-far unreleased #ESAEuclid data: "Space Warps – ESA Euclid DR1".
3000 volunteers have already made nearly 900,000 classifications, yet 70% of the project are still to be done.
All the background and link to the Zooniverse: https://www.zooniverse.org/projects/aprajita/space-warps-esa-euclid
#ESA #Euclid #astronomy #GravitationalLensing #science #CitizenScience.
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Would you like to be part of citizen science astronomy? We invite you to classify gravitational lens candidates in so-far unreleased #ESAEuclid data: "Space Warps – ESA Euclid DR1".
3000 volunteers have already made nearly 900,000 classifications, yet 70% of the project are still to be done.
All the background and link to the Zooniverse: https://www.zooniverse.org/projects/aprajita/space-warps-esa-euclid
#ESA #Euclid #astronomy #GravitationalLensing #science #CitizenScience.
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Would you like to be part of citizen science astronomy? We invite you to classify gravitational lens candidates in so-far unreleased #ESAEuclid data: "Space Warps – ESA Euclid DR1".
3000 volunteers have already made nearly 900,000 classifications, yet 70% of the project are still to be done.
All the background and link to the Zooniverse: https://www.zooniverse.org/projects/aprajita/space-warps-esa-euclid
#ESA #Euclid #astronomy #GravitationalLensing #science #CitizenScience.
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Would you like to be part of citizen science astronomy? We invite you to classify gravitational lens candidates in so-far unreleased #ESAEuclid data: "Space Warps – ESA Euclid DR1".
3000 volunteers have already made nearly 900,000 classifications, yet 70% of the project are still to be done.
All the background and link to the Zooniverse: https://www.zooniverse.org/projects/aprajita/space-warps-esa-euclid
#ESA #Euclid #astronomy #GravitationalLensing #science #CitizenScience.
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Mega Laser Beam Signal: Astronomers detect mega-laser beam signal from 8 billion light-years away |
One of the most remarkable discoveries made by astronomers in recent years is the identification of an extremely…
#NewsBeep #News #Physics #astronomydiscoveries #gravitationallensing #HATLASJ142935.3–002836 #hydroxylmegamaser #mega-lasersignal #radiotelescope #Science #spacesignals #supermassiveblackholes #UK #UnitedKingdom
https://www.newsbeep.com/uk/528560/ -
Mega Laser Beam Signal: Astronomers detect mega-laser beam signal from 8 billion light-years away |
One of the most remarkable discoveries made by astronomers in recent years is the identification of an extremely…
#NewsBeep #News #Physics #astronomydiscoveries #AU #Australia #gravitationallensing #HATLASJ142935.3–002836 #hydroxylmegamaser #mega-lasersignal #radiotelescope #Science #spacesignals #supermassiveblackholes
https://www.newsbeep.com/au/603514/ -
Mega Laser Beam Signal: Astronomers detect mega-laser beam signal from 8 billion light-years away |
One of the most remarkable discoveries made by astronomers in recent years is the identification of an extremely…
#NewsBeep #News #Physics #astronomydiscoveries #AU #Australia #gravitationallensing #HATLASJ142935.3–002836 #hydroxylmegamaser #mega-lasersignal #radiotelescope #Science #spacesignals #supermassiveblackholes
https://www.newsbeep.com/au/603514/ -
New in the #VirtualObservatory: “Gaia GraL. X.” by Ducourant C. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A345
#GravitationalLensing #Redshifted #Quasars #VisibleAstronomy -
Astronomers spot 2 ‘time-warped’ supernovas whose light both has and hasn’t reached Earth
When you buy through links on our articles, Future and its syndication partners may earn a commission. The…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Space #ConorLarison #galaxycluster #ghostlyimages #gravitationallensing #HubbleSpaceTelescope #JamesWebbSpaceTelescope #multipleimages #Science #supernovas
https://www.newsbeep.com/us/442907/ -
AI Unlocks Hundreds of Cosmic Anomalies in Hubble Archive https://science.nasa.gov/missions/hubble/ai-unlocks-hundreds-of-cosmic-anomalies-in-hubble-archive/ #NASA #ArtificialIntelligenceAI #Astrophysics #AstrophysicsDivision #Galaxies #GoddardSpaceFlightCenter #GravitationalLensing #HubbleSpaceTelescope #IrregularGalaxies #OriginEvolutionOfTheUniverse #TheUniverse
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AI Unlocks Hundreds of Cosmic Anomalies in Hubble Archive https://science.nasa.gov/missions/hubble/ai-unlocks-hundreds-of-cosmic-anomalies-in-hubble-archive/ #NASA #Astrophysics #AstrophysicsDivision #Galaxies #GoddardSpaceFlightCenter #GravitationalLensing #HubbleSpaceTelescope #IrregularGalaxies #OriginEvolutionOfTheUniverse #TheUniverse
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R.I.P. Yannick Mellier (1958-2025)
Last night I received a message via the Euclid Consortium conveying the very sad news of the death, at the age of 67, of the French astrophysicist and cosmologist Yannick Mellier (pictured left). Among many other things, Yannick was the Euclid Consortium Lead in which role he took on enormous responsibility for getting the project started and, with his team, keeping everything running. His loss is incalculable.
Yannick’s research work focussed on cosmology and the search for dark matter using gravitational lensing. Back in 1987 he was part of the observational team that discovered the first giant arc produced by strong gravitational lensing. He also did pioneering work in the field of weaking gravitational lensing with the Canada-France Hawaii Telescope in that regard starting back in 2000.
For well over a decade now Yannick had been involved with the European Space Agency’s Euclid mission. He was a major force right from the beginning, making the proposal, and after it was accepted leading the Consortium assembled to bring the project into being, preparing for launch, and dealing with the first data. The Euclid Consortium is a huge collaboration and it is impossible to overestimate the scale of the task facing the Lead. The first full data release (DR1) from Euclid will take place towards the end of next year (2026). It is sad beyong words that he did not live to see this.
During the period when I was Chair of the Euclid Consortium Diversity Committee I had a number of interactions with Yannick, sometimes dealing with difficult and confidential matters. I found him to be a man of great wisdom and sensitivity. Despite having many other things to deal with, including a long-term illness, he was unfailingly supportive and his advice was always sound.
The following is an excerpt from the message sent out yesterday:
Yannick’s death leaves a huge void within the consortium and our community. Those of us who have been here the longest know how hard he worked to make the Euclid project a success. He became its embodiment, working tirelessly to ensure its success; we owe him an immense debt of gratitude, and we will surely have the opportunity to reflect in detail on all that we owe him.
Indeed. I hope the Euclid Consortium – and the international cosmological community generally – will, at some stage, organize an appropriate tribute to Yannick.
Rest in Peace, Yannick Mellier (1958-2025)
Ar dheis Dé go raibh a anam
#Cosmology #Euclid #EuclidConsortium #GravitationalLensing #YannickMellier
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Bullet Cluster (Webb and Chandra Compass Image) ✨
#Cosmology #GalaxyClusters #GravitationalLensing #Multiwavelength
⏩ 3 new pictures from Webb (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=5&user=OptimusPrimeBot&ilshowall=1&offset=20250701043453
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NASA’s Webb Reveals Galaxy Population Driving Cosmic Renovation ☀️✨
#Ast #Astrophysics #Galaxy #GalaxyCluster #GravitationalLensing #Reionization #SolarMagneticField #SolarMaximum
⏩ 2 new pictures and 1 new video from NASA (SVS) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=14&user=OptimusPrimeBot&ilshowall=1&offset=20250612130129
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Incredible new #JWST deep field (120 hours!) released by folks from ESA/NASA Webb teams.
Not only is nearly everything in this image a galaxy (the two spiky stars are not), but those curved arcs are images of galaxies beyond this cluster, which are projected and warped into our view thanks to the power of gravity!
It's called a gravitational lens. To visualise what's happening, take a look at this diagram.
There are distant galaxies that we can't normally see. There's also a galaxies between them and us, with lots of mass.
This mass warps space-time and bends the distant galaxy light towards us so we see them.
I am amazed. You should be amazed. This is a really epic image.
Galaxy image and alt-text credit: ESA/Webb, NASA & CSA, H. Atek, M. Zamani (ESA/Webb)
Diagram credit: NASA, ESA & L. Calçada
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The KiDS Legacy
What with all the cosmological goings-on of the past couple of weeks – see here, here and here – I quite forgot to mention another important set of results. These are from the final data release Kilo-Degree Survey known as KiDS for short and represent a final analysis of the complete dataset. For those of you not in the know, KiDs is a weak lensing shear tomography survey and its core science drivers are to map the large scale matter distribution in the Universe and constrain the equation of state of Dark Energy. The results can be found in three papers on arXiv, which you can add to your reading list:
- KiDS-Legacy: Redshift distributions and their calibration (Wright et al.)
- KiDS-Legacy: Cosmological constraints from cosmic shear with the complete Kilo-Degree Survey (Wright et al.)
- KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes (Stölzner et al.)
As far as I’m concerned, the main result to leap out from the cosmological analysis, which primarily constrains the clumpiness of matter in the universe, expressed by the density parameter Ωm and a fluctuation amplitude σ8 in the combined parameter “S8“, which is constrained almost independently from Ωm. The value obtained for this parameter by KiDS has previously been “in tension” with values from other experiments (notably Planck) ; see here for a discussion. The new results, however, seem consistent with the standard cosmological model. Here is a figure from the last paper in the above list that illustrates the point:
As is often the case, there’s also one of those nice Cosmology Talks videos that discusses this and other aspects of the KiDS Legacy results to which I refer you for more details!
https://www.youtube.com/watch?v=PIQKe-tW1xQ
#arXiv250319440 #arXiv250319441 #arXiv250319442 #DarEnergy #GravitationalLensing #KIDS #KiloDegreeSurvey #KilodegreeSurvey #weakGravitationalLensing
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The KiDS Legacy
What with all the cosmological goings-on of the past couple of weeks – see here, here and here – I quite forgot to mention another important set of results. These are from the final data release Kilo-Degree Survey known as KiDS for short and represent a final analysis of the complete dataset. For those of you not in the know, KiDs is a weak lensing shear tomography survey and its core science drivers are to map the large scale matter distribution in the Universe and constrain the equation of state of Dark Energy. The results can be found in three papers on arXiv, which you can add to your reading list:
- KiDS-Legacy: Redshift distributions and their calibration (Wright et al.)
- KiDS-Legacy: Cosmological constraints from cosmic shear with the complete Kilo-Degree Survey (Wright et al.)
- KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes (Stölzner et al.)
As far as I’m concerned, the main result to leap out from the cosmological analysis, which primarily constrains the clumpiness of matter in the universe, expressed by the density parameter Ωm and a fluctuation amplitude σ8 in the combined parameter “S8“, which is constrained almost independently from Ωm. The value obtained for this parameter by KiDS has previously been “in tension” with values from other experiments (notably Planck) ; see here for a discussion. The new results, however, seem consistent with the standard cosmological model. Here is a figure from the last paper in the above list that illustrates the point:
As is often the case, there’s also one of those nice Cosmology Talks videos that discusses this and other aspects of the KiDS Legacy results to which I refer you for more details!
https://www.youtube.com/watch?v=PIQKe-tW1xQ
#arXiv250319440 #arXiv250319441 #arXiv250319442 #DarEnergy #GravitationalLensing #KIDS #KiloDegreeSurvey #KilodegreeSurvey #weakGravitationalLensing
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The KiDS Legacy
What with all the cosmological goings-on of the past couple of weeks – see here, here and here – I quite forgot to mention another important set of results. These are from the final data release Kilo-Degree Survey known as KiDS for short and represent a final analysis of the complete dataset. For those of you not in the know, KiDs is a weak lensing shear tomography survey and its core science drivers are to map the large scale matter distribution in the Universe and constrain the equation of state of Dark Energy. The results can be found in three papers on arXiv, which you can add to your reading list:
- KiDS-Legacy: Redshift distributions and their calibration (Wright et al.)
- KiDS-Legacy: Cosmological constraints from cosmic shear with the complete Kilo-Degree Survey (Wright et al.)
- KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes (Stölzner et al.)
As far as I’m concerned, the main result to leap out from the cosmological analysis, which primarily constrains the clumpiness of matter in the universe, expressed by the density parameter Ωm and a fluctuation amplitude σ8 in the combined parameter “S8“, which is constrained almost independently from Ωm. The value obtained for this parameter by KiDS has previously been “in tension” with values from other experiments (notably Planck) ; see here for a discussion. The new results, however, seem consistent with the standard cosmological model. Here is a figure from the last paper in the above list that illustrates the point:
As is often the case, there’s also one of those nice Cosmology Talks videos that discusses this and other aspects of the KiDS Legacy results to which I refer you for more details!
https://www.youtube.com/watch?v=PIQKe-tW1xQ
#arXiv250319440 #arXiv250319441 #arXiv250319442 #DarEnergy #GravitationalLensing #KIDS #KiloDegreeSurvey #KilodegreeSurvey #weakGravitationalLensing
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The KiDS Legacy
What with all the cosmological goings-on of the past couple of weeks – see here, here and here – I quite forgot to mention another important set of results. These are from the final data release Kilo-Degree Survey known as KiDS for short and represent a final analysis of the complete dataset. For those of you not in the know, KiDs is a weak lensing shear tomography survey and its core science drivers are to map the large scale matter distribution in the Universe and constrain the equation of state of Dark Energy. The results can be found in three papers on arXiv, which you can add to your reading list:
- KiDS-Legacy: Redshift distributions and their calibration (Wright et al.)
- KiDS-Legacy: Cosmological constraints from cosmic shear with the complete Kilo-Degree Survey (Wright et al.)
- KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes (Stölzner et al.)
As far as I’m concerned, the main result to leap out from the cosmological analysis, which primarily constrains the clumpiness of matter in the universe, expressed by the density parameter Ωm and a fluctuation amplitude σ8 in the combined parameter “S8“, which is constrained almost independently from Ωm. The value obtained for this parameter by KiDS has previously been “in tension” with values from other experiments (notably Planck) ; see here for a discussion. The new results, however, seem consistent with the standard cosmological model. Here is a figure from the last paper in the above list that illustrates the point:
As is often the case, there’s also one of those nice Cosmology Talks videos that discusses this and other aspects of the KiDS Legacy results to which I refer you for more details!
https://www.youtube.com/watch?v=PIQKe-tW1xQ
#arXiv250319440 #arXiv250319441 #arXiv250319442 #DarEnergy #GravitationalLensing #KIDS #KiloDegreeSurvey #KilodegreeSurvey #weakGravitationalLensing
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The KiDS Legacy
What with all the cosmological goings-on of the past couple of weeks – see here, here and here – I quite forgot to mention another important set of results. These are from the final data release Kilo-Degree Survey known as KiDS for short and represent a final analysis of the complete dataset. For those of you not in the know, KiDs is a weak lensing shear tomography survey and its core science drivers are to map the large scale matter distribution in the Universe and constrain the equation of state of Dark Energy. The results can be found in three papers on arXiv, which you can add to your reading list:
- KiDS-Legacy: Redshift distributions and their calibration (Wright et al.)
- KiDS-Legacy: Cosmological constraints from cosmic shear with the complete Kilo-Degree Survey (Wright et al.)
- KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes (Stölzner et al.)
As far as I’m concerned, the main result to leap out from the cosmological analysis, which primarily constrains the clumpiness of matter in the universe, expressed by the density parameter Ωm and a fluctuation amplitude σ8 in the combined parameter “S8“, which is constrained almost independently from Ωm. The value obtained for this parameter by KiDS has previously been “in tension” with values from other experiments (notably Planck) ; see here for a discussion. The new results, however, seem consistent with the standard cosmological model. Here is a figure from the last paper in the above list that illustrates the point:
As is often the case, there’s also one of those nice Cosmology Talks videos that discusses this and other aspects of the KiDS Legacy results to which I refer you for more details!
https://www.youtube.com/watch?v=PIQKe-tW1xQ
#arXiv250319440 #arXiv250319441 #arXiv250319442 #DarEnergy #GravitationalLensing #KIDS #KiloDegreeSurvey #KilodegreeSurvey #weakGravitationalLensing
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Five New Publications at the Open Journal of Astrophysics
Time for the usual Saturday summary of papers at the Open Journal of Astrophysics. We have published five more papers since the last update a week ago. The count in Volume 7 (2024) is now up to 119 and the total altogether to 234. As I mentioned in a post last week this means we have published more papers this year (2024) than in all previous years put together.
In chronological order, the five papers published this week, with their overlays, are as follows. You can click on the images of the overlays to make them larger should you wish to do so.
First one up, published on Wednesday 18th December 2024 is “The picasso gas model: Painting intracluster gas on gravity-only simulations” byby Florian Kéruzoré, L. E. Bleem, N. Frontiere, N. Krishnan, M. Buehlmann, J. D. Emberson, S. Habib, and P. Larsen all of the Argonne National Laboratory, USA. The paper, which is in the folder marked Cosmology and NonGalactic Astrophysics describes a method using machine learning based on an analytical gas model to predict properties of the intracluster medium.
Here is a screen grab of the overlay, which includes the abstract:
You can find the officially accepted version of the paper on the arXiv here.
The second paper to announce, and the first of four published on Wednesday 19th December 2024, “maria: A novel simulator for forecasting (sub-)mm observations” by J. van Marrewijk (ESO, Garching, Germany) and 10 others based in Germany, USA, Norway, France and Italy. This paper describes a multi-purpose telescope simulator that optimizes scanning strategies and instrument designs, produces synthetic time-ordered data, time streams, and maps from hydrodynamical simulations, thereby enabling comparison between theory and observations. This one is in the folder marked Instrumentation and Methods for Astrophysics.
You can see the overlay here:
The accepted version of this paper can be found on the arXiv here.
The third paper is “Detached Circumstellar Matter as an Explanation for Slowly-Rising Interacting Type Ibc Supernovae” by Yuki Takei (Kyoto U., Japan) & Daichi Tsuna (Caltech, USA). This one was also published on 19th December and is in the folder marked High-Energy Astrophysical Phenomena. The overlay is here:
The officially accepted version can be found on arXiv here.
The fourth paper, also published on 19th December 2024, is called “On the dark matter content of ultra-diffuse galaxies” and was written by Andrey Kravtsov (U. Chicago, USA). The article discusses the implications of measured velocity dispersions of ultra-diffuse galaxies for models of galaxy formation and is in the folder marked Astrophysics of Galaxies.
The overlay is here
You can find the officially accepted version of this paper here.
The fifth paper in this batch is “Estimating Exoplanet Mass using Machine Learning on Incomplete Datasets” by Florian Lalande (Okinawa Institute of Science and Technology), Elizabeth Tasker (Institute of Space and Astronautical Science, Kanagawa) and Kenji Doya (Okinawa); all based in Japan. This one was published on 10th October 2024 in the folder marked Earth and Planetary Astrophysics. It compares different methods for inferring exoplanet masses in catalogues with missing data
You can find the official accepted version on the arXiv here.
Finally for this week we have “A new non-parametric method to infer galaxy cluster masses from weak lensing” by Tobias Mistele (Case Western Reserve University, USA) and Amel Durakovic (Czech Academy of Sciences, Czechia). This one was also published on 19th December and is in the folder Cosmology and NonGalactic Astrophysics. The overlay is here
You can find the officially-accepted version on arXiv here.
That’s in for this week. I will do another update next Saturday only if we have any new papers on Monday. I will be taking a break over Christmas and also preparing Volume 8 (2025) for the new year, so publishing will be suspended from 24th December until 2nd January (inclusive). If you want your paper to be published in 2024 the final version must be on arXiv by Monday 23rd December at the latest, otherwise it will be held over until 2025.
#arXiv240210731v3 #arXiv240402566v2 #arXiv240613732v2 #arXiv240807026v3 #arXiv240817445v2 #AstrophysicsOfGalaxies #CosmologyAndNonGalacticAstrophysics #darkMatter #GravitationalLensing #HighEnergyAstrophysicalPhenomena #InstrumentationAndMethodsForAstrophysics #subMmAstronomy #supernovae #ultraDiffuseGalaxies
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Illustration of the Firefly Sparkle Galaxy in the Early Universe (Artist's Concept) ✨
#Galaxies #GalaxyClusters #GravitationalLensing
⏩ 4 new pictures from Webb (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=5&user=OptimusPrimeBot&ilshowall=1&offset=20241212100528
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Found: First Actively Forming Galaxy as Lightweight as Young Milky Way https://science.nasa.gov/missions/webb/found-first-actively-forming-galaxy-as-lightweight-as-young-milky-way/ #NASA #Astrophysics #Galaxies #GalaxyClusters #GoddardSpaceFlightCenter #GravitationalLensing #JamesWebbSpaceTelescopeJWST #ScienceResearch #TheUniverse
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Question Mark Galaxy, Annotated (NIRCam Compass Image) ✨
#DistantGalaxies #Galaxies #GalaxyClusters #GravitationalLensing
⏩ 4 new pictures from Webb (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=4&user=OptimusPrimeBot&ilshowall=1&offset=20240905103627
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#GeraintLewis - The #DarkSide of the #Universe
https://www.youtube.com/watch?v=vxl5Ov2xyKE
#Philosophy #PhilosophyOfScience #Science #PhilosophyOfCosmology #Cosmology #BigBang #DarkMatter #StandardModel #LambdaCDM #CDM #CMB #CosmicMicrowaveBackground #Gravity #GravitationalLensing #MOND #Lensing #DarkEnergy #Astronomy #Astrophysics #Physics #ParticlePhysics #CloserToTruth #RobertKuhn
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Early South Pole Telescope data has found that Einstein was right… again
✍️ by Jacinta Bowler for Cosmos Magazine
https://cosmosmagazine.com/space/south-pole-telescope-general-relativity/#SPTelescope #physics #Einstein #AmundsenScott #SouthPole #Station #Antarctica #telescope #Measurement #gravitationallensing #lensing #CMB #map #temperature #polarization #relativity #generalrelativity #universe #astronomy #astrophysics #astrodon #space #science #research #STEM #CosmosMagazine #cosmos #magazine #cosmicmicrowavebackground
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Gravitational lensing has to be one of the most visually striking phenomena in astronomy
Gravitational lensing is a phenomenon where a massive object bend the light of a distant source as it approaches the observer. Most often this takes the form of enormous galaxy clusters bending the light of even more distant galaxies into warped images of their true selves. They typically follow an arc around the massive object in the foreground like ripples in a pond.
Here's a few of my favourite gravitational lensing events.
Abel 1689 – Virgo
Abel 1689 is a one of the largest galaxy clusters in the known universe. It's located about 2.459 billion light-years away in constellation Virgo. Not only is this image visually beautiful, but the sheer number of gravitationally lensed galaxies across the entire image is just mind-blowing.
In 2008, one of the lensed galaxies, A1689-zD1, became known as the most distant galaxy from Earth based on a photometric redshift. 2008 also happens to be the same year the astronomy bug really bit me and it became one of my life-long passions.
You can find the original image file here.
PSZ1 G311.65-18.48 – Apus
PSZ1 G311.65-18.48 is a massive galaxy cluster located 4.6 billion light-years away in the constellation Apus. What's especially remarkable about this image is that it features a bright galaxy that's been lensed 12 separate times along four arcs. Three of these arcs are visible to the upper right of the cluster, while a fainter fourth arc is partially obscured by a bright foreground star to the bottom left of the cluster. This galaxy is almost 12 billion light-years away from Earth, which given its title as the brightest gravitationally lensed galaxy is quite a remarkable feat.
You can find the original image file here.
#astronomy #HubbleSpaceTelescope #galaxycluster #galaxies #supernova #gravitationallensing
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I don't talk about astronomy nearly enough, so let's change that!
One of the most groundbreaking developments in astronomy has been the absolutely mind-blowing work the James Webb Space Telescope has been putting out in a fraction of the time it took the old Hubble Space Telescope to produce similar work. Here are a couple of recent images I find particularly remarkable.
S1 LMC N79 – Dorado
Honestly, this image is just beautiful to look at. It’s even more breathtaking when you consider that this is just one cloud within this star-forming region of the Large Magellanic Cloud, which itself is an irregular galaxy located about 163,000 light-years from Earth. If you live in the Southern Hemisphere and find yourself a suitably dark place, you can gaze up and see this whole other galaxy as a milky blotch in the night sky.
You can read more about this image here.
A gravitationally lensed supernova in MRG-M0138 – Cetus
It's pretty wild seeing the immense force of gravity contained within these galactic clusters warp distant points of light in these visually striking ways. Each arc is a galaxy far beyond the cluster itself that allow us to peer further back in time. Sometimes these warped images mirror themselves on the complete opposite side of the cluster, like ripples on a pond. In the case of this distant supernova, the light emanating from that cataclysmic event is being reflected in such a way that it's reappearing further down the length of the arc, making it seem as though there are two supernovae happening when in fact they are the same.
You can read more about this image here.
#astronomy #jameswebbspacetelescope #starcluster #stellarnursery #molecularcloud #largemagellaniccloud #supernova #gravitationallensing #galaxies
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@spaceflight
This is a similar concept as the solar gravitational lens for making the biggest aperture space telescope possible.
https://en.m.wikipedia.org/wiki/Solar_gravitational_lensCalling it "communication" may be a bit farfetched for anything that far away and because the alignment with stars is only temporary. It does makes it possible to transfer our history in an efficient way though.
It's more akin to dropping "letters in a bottle" into the ocean, rather than the internet.
#gravitationallensing #space #sgl -
MACS 0416 Mothra Pullout (Hubble ACS and WFC3 + Webb NIRCam Image) ✨
#DeepFields #DistantGalaxies #FrontierFields #Galaxies #GalaxyClusters #GravitationalLensing #Multimission
⏩ 4 new pictures from Hubble (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=7&user=OptimusPrimeBot&ilshowall=1&offset=20231111092210
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The JWST Discovery of the Triply-imaged Type Ia "Supernova H0pe" and Observations of the #GalaxyCluster PLCK G165.7+67.0: https://arxiv.org/abs/2309.07326 -> JWST’s first triple-image supernova could save the Universe: https://bigthink.com/starts-with-a-bang/triple-lens-supernova-jwst/ - named #Supernova H0pe, it shows how #JWST plus #GravitationalLensing can be used to solve the greatest puzzle facing astronomy today, the #HubbleConstant tension.
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Why Do #BlackHoles Look Like This?!
https://www.youtube.com/watch?v=R2YsF47BMvY&ab_channel=TheScienceAsylum
#ScienceAsylum #NickLucid #Science #Astrophysics #Physics #GR #GeneralRelativity #Gravity #Spacetime #WarpedSpacetime #WarpedSpace #AccretionDisk #PhotonSphere #Lens #GravitationalLens #GravitationalLensing #Optics #Doppler #Shadow
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Uncovering a population of gravitational lens galaxies with magnified standard candle SN #Zwicky: https://www.nature.com/articles/s41550-023-01981-3 -> Rare #GravitationalLensing Warps Light Of Distant #Supernova Into Four Images: https://keckobservatory.org/sn-zwicky
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“Lensed” supernova could shed light on fundamental forces shaping Universe - Enlarge / Gravitational lensing has revealed a previously unknown super... - https://arstechnica.com/?p=1947028 #acceleratinguniverse #gravitationallensing #generalrelativity #hubblesconstant #darkenergy #darkmatter #supernovas #astronomy #science #physics
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“Lensed” supernova could shed light on fundamental forces shaping Universe - Enlarge / Gravitational lensing has revealed a previously unknown super... - https://arstechnica.com/?p=1947028 #acceleratinguniverse #gravitationallensing #generalrelativity #hubblesconstant #darkenergy #darkmatter #supernovas #astronomy #science #physics
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“Lensed” supernova could shed light on fundamental forces shaping Universe - Enlarge / Gravitational lensing has revealed a previously unknown super... - https://arstechnica.com/?p=1947028 #acceleratinguniverse #gravitationallensing #generalrelativity #hubblesconstant #darkenergy #darkmatter #supernovas #astronomy #science #physics
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“Lensed” supernova could shed light on fundamental forces shaping Universe - Enlarge / Gravitational lensing has revealed a previously unknown super... - https://arstechnica.com/?p=1947028 #acceleratinguniverse #gravitationallensing #generalrelativity #hubblesconstant #darkenergy #darkmatter #supernovas #astronomy #science #physics
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“Lensed” supernova could shed light on fundamental forces shaping Universe - Enlarge / Gravitational lensing has revealed a previously unknown super... - https://arstechnica.com/?p=1947028 #acceleratinguniverse #gravitationallensing #generalrelativity #hubblesconstant #darkenergy #darkmatter #supernovas #astronomy #science #physics
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Anomalies in Gravitational-Lensed Images Revealing Einstein Rings Modulated by Wavelike #DarkMatter: https://arxiv.org/abs/2304.09895 -> No WIMPS! Heavy particles don’t explain #GravitationalLensing oddities - detailed look at a lensed galaxy favors lighter particles called #axions: https://theconversation.com/new-look-at-einstein-rings-around-distant-galaxies-just-got-us-closer-to-solving-the-dark-matter-debate-204109 and https://arstechnica.com/science/2023/04/gravitational-lensing-may-point-to-lighter-dark-matter-candidate/
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New look at 'Einstein rings' around distant galaxies just got us closer to solving the dark matter debate
#EinsteinRings
#DarkMatter
#Galaxies
#FundamentalParticle
#WIMPs
#Axions
#Einstein
#EinsteinsTheory
#Gravity
#GravitationalLensing
#Amruth
https://phys.org/news/2023-04-einstein-distant-galaxies-closer-dark.html -
#CosmicVoids should be detectable via their #GravitationalLensing effects.
Check this starting with a floppy-disk sized source snapshot [1].
#Reproducibility is via the #Maneage template of shell+make files.
Full research paper: [2][3][4][5][1] https://zenodo.org/record/7792910/files/lensing-e4f7af0-snapshot.tar.gz
[2] Preprint: https://arxiv.org/abs/2304.00591 #ArXiv_2304_00591
[3] Frozen record: https://zenodo.org/record/7792910
[4] Live git: https://codeberg.org/mpeper/lensing