#pulsars — Public Fediverse posts

Weekly Update from the Open Journal of Astrophysics – 23/05/2026

It’s Saturday once again, so time for another 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 110 and the total so far published by OJAp up to 558.

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 Monday 18th May in the folder Instrumentation and Methods for Astrophysics is “Edges In Coadded Images” by Erin Sheldon (Brookhaven National Laboratory, USA). This paper describes a study exploring how image discontinuities and noise impact weak gravitational lensing measurements, finding no significant biases under typical conditions. Biases occur only in extreme cases, but can be mitigated.

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/116594222032390191

The second paper for this week, also published on Monday 18th May but in the folder Cosmology and Nongalactic Astrophysics, is “Joint cosmological fits to DESI-DR1 full-shape clustering and weak gravitational lensing in configuration space” by A. Semenaite (Swinburne Institute of Technology, Australia) and 72 other authors from all round the world. This paper presents a cosmological analysis of correlations between the DESI-DR1 Bright Galaxy Survey and Luminous Red Galaxy samples and overlapping shear measurements from various weak lensing surveys.

The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:

https://fediscience.org/@OJ_Astro/116594256215421009

Next one up, the third paper of the week, and the third published on Monday 18th May, also published on Tuesday 12th May, and in the folder Cosmology and Nongalactic Astrophysics is “Probing Dark Energy Microphysics with kSZ Tomography” by Julius Adolff, Selim Hotinli and Neal Dalal (all of the Perimeter Institute, Canada). This paper explores how kinetic Sunyaev-Zel’dovich tomography and galaxy clustering can enhance our understanding of dark energy and its effects, potentially revealing its microphysical properties in future surveys.

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/116594304124291605

The fourth paper this week, published on Wednesday May 20th “A Census of Variable Radio Sources at 3 GHz” by Yjan A. Gordon, Peter S. Ferguson, Michael N. Martinez and Eric J. Hooper (all of the University of Wisconsin, USA). This article, published in the folder Astrophysics of Galaxies, uses data from the Very Large Array Sky Survey to analyze variability in the radio sky, finding most changes consistent with blazars and quasars.

The overlay is here:

The officially accepted version can be found on arXiv here and here is the Mastodon announcement:

https://fediscience.org/@OJ_Astro/116607468481260244

The fifth article of this week was published on Friday 22nd May in the folder Instrumentation and Methods for Astrophysics. The title is “Uncovering the Next Galactic Supernova with the Vera C. Rubin Observatory” by John Banovetz (Lawrence Berkeley Lab., USA), Claire-Alice Hebert & Peter B. Denton (Brookhaven National Lab., USA), Dan Scolnic (Duke University, USA), Anze Slosar (Brookhaven) and Chris Walter (Duke). The paper presents a study simulating how effectively the Vera C. Rubin Observatory can localize supernovae using neutrino triggers, finding a 57-97% success rate based on stellar mass density predictions.

The overlay is here:

You can find the authorized version of this paper on arXiv here and the Fediverse announcement is here:

https://fediscience.org/@OJ_Astro/116617293753093751

Last, but by no means least, this week we have “Pulsar timing solutions for 17 pulsars at 150 MHz from the Irish LOFAR station” by David J. McKenna (ASTRON, The Netherlands), Evan F. Keane (Trinity College Dublin, Ireland), Peter T. Gallagher (DIAS, Ireland) and Joe McCauley (Trinity). This was published on Friday 22nd May in the folder High-Energy Astrophysical Phenomena. It presents a demonstration of the use of international Low Frequency Array (LOFAR) stations in tracking and characterizing pulsars, providing new insights into these neutron stars’ emission properties.

The overlay for this one is here:

You can find the authorized version of this paper on arXiv here and the Fediverse announcement is here:

https://fediscience.org/@OJ_Astro/116617404344791486

And that concludes this week’s update. I’ll do another one next Saturday.

Weekly Update from the Open Journal of Astrophysics – 23/05/2026

It’s Saturday once again, so time for another 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 110 and the total so far published by OJAp up to 558.

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 Monday 18th May in the folder Instrumentation and Methods for Astrophysics is “Edges In Coadded Images” by Erin Sheldon (Brookhaven National Laboratory, USA). This paper describes a study exploring how image discontinuities and noise impact weak gravitational lensing measurements, finding no significant biases under typical conditions. Biases occur only in extreme cases, but can be mitigated.

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/116594222032390191

The second paper for this week, also published on Monday 18th May but in the folder Cosmology and Nongalactic Astrophysics, is “Joint cosmological fits to DESI-DR1 full-shape clustering and weak gravitational lensing in configuration space” by A. Semenaite (Swinburne Institute of Technology, Australia) and 72 other authors from all round the world. This paper presents a cosmological analysis of correlations between the DESI-DR1 Bright Galaxy Survey and Luminous Red Galaxy samples and overlapping shear measurements from various weak lensing surveys.

The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:

https://fediscience.org/@OJ_Astro/116594256215421009

Next one up, the third paper of the week, and the third published on Monday 18th May, also published on Tuesday 12th May, and in the folder Cosmology and Nongalactic Astrophysics is “Probing Dark Energy Microphysics with kSZ Tomography” by Julius Adolff, Selim Hotinli and Neal Dalal (all of the Perimeter Institute, Canada). This paper explores how kinetic Sunyaev-Zel’dovich tomography and galaxy clustering can enhance our understanding of dark energy and its effects, potentially revealing its microphysical properties in future surveys.

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/116594304124291605

The fourth paper this week, published on Wednesday May 20th “A Census of Variable Radio Sources at 3 GHz” by Yjan A. Gordon, Peter S. Ferguson, Michael N. Martinez and Eric J. Hooper (all of the University of Wisconsin, USA). This article, published in the folder Astrophysics of Galaxies, uses data from the Very Large Array Sky Survey to analyze variability in the radio sky, finding most changes consistent with blazars and quasars.

The overlay is here:

The officially accepted version can be found on arXiv here and here is the Mastodon announcement:

https://fediscience.org/@OJ_Astro/116607468481260244

The fifth article of this week was published on Friday 22nd May in the folder Instrumentation and Methods for Astrophysics. The title is “Uncovering the Next Galactic Supernova with the Vera C. Rubin Observatory” by John Banovetz (Lawrence Berkeley Lab., USA), Claire-Alice Hebert & Peter B. Denton (Brookhaven National Lab., USA), Dan Scolnic (Duke University, USA), Anze Slosar (Brookhaven) and Chris Walter (Duke). The paper presents a study simulating how effectively the Vera C. Rubin Observatory can localize supernovae using neutrino triggers, finding a 57-97% success rate based on stellar mass density predictions.

The overlay is here:

You can find the authorized version of this paper on arXiv here and the Fediverse announcement is here:

https://fediscience.org/@OJ_Astro/116617293753093751

Last, but by no means least, this week we have “Pulsar timing solutions for 17 pulsars at 150 MHz from the Irish LOFAR station” by David J. McKenna (ASTRON, The Netherlands), Evan F. Keane (Trinity College Dublin, Ireland), Peter T. Gallagher (DIAS, Ireland) and Joe McCauley (Trinity). This was published on Friday 22nd May in the folder High-Energy Astrophysical Phenomena. It presents a demonstration of the use of international Low Frequency Array (LOFAR) stations in tracking and characterizing pulsars, providing new insights into these neutron stars’ emission properties.

The overlay for this one is here:

You can find the authorized version of this paper on arXiv here and the Fediverse announcement is here:

https://fediscience.org/@OJ_Astro/116617404344791486

And that concludes this week’s update. I’ll do another one next Saturday.

https://www.europesays.com/ch-fr/139984/ Des astronomes ont découvert 15 nouveaux pulsars dans un amas globulaire proche de la Terre #47Tucanae #astronomes #Astronomie #Astrophysique #cosmos #découverte #Espace #ÉtoileàNeutrons #étoiles #Galaxie #InformationsSurDesOrdinateursPortatifs #nouvelles #NouvellesDeL'astronomie #NouvellesDeL'espace #NouvellesScientifiques #pulsars #rapport #revues #Science #ScienceAndTechnology #Sciences #SciencesEtTechnologies #Suisse #Technologies #Technology #Télescope #test

https://www.europesays.com/ie/485808/ In 1967, a Cambridge student spotted a ‘scruffy’ printout blip that revealed the universe’s mysterious ticking stars #Astronomy #CambridgeUniversity #CosmicClocks #Éire #GravitationalWaves #IE #Ireland #JocelynBellBurnell #NeutronStars #Pulsars #Science #SpaceExploration

New in the #VirtualObservatory: “Flare param. from K2 & TESS data of PSR J1023+0038” by Zhang L.-Y. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/960/20
#VisibleAstronomy #Photometry #StellarFlares #Pulsars

Entdeckt unsere neue Pressemitteilung!

Check out our new press release!

➡️ https://www.mpifr-bonn.mpg.de/pressemeldungen/2026/radiosignale-aus-dem-randbereich-extremer-sterne

#Astrophysik #Radioastronomie #Pulsare #MPIfR #Wissenschaft #Universe #Cosmos #Entdeckung #Astronomy #RadioAstronomy #Pulsars #MPIfR #Science #Space #Cosmos #Astrophysics

Entdeckt unsere neue Pressemitteilung!

Check out our new press release!

➡️ https://www.mpifr-bonn.mpg.de/pressemeldungen/2026/radiosignale-aus-dem-randbereich-extremer-sterne

#Astrophysik #Radioastronomie #Pulsare #MPIfR #Wissenschaft #Universe #Cosmos #Entdeckung #Astronomy #RadioAstronomy #Pulsars #MPIfR #Science #Space #Cosmos #Astrophysics

Entdeckt unsere neue Pressemitteilung!

Check out our new press release!

➡️ https://www.mpifr-bonn.mpg.de/pressemeldungen/2026/radiosignale-aus-dem-randbereich-extremer-sterne

#Astrophysik #Radioastronomie #Pulsare #MPIfR #Wissenschaft #Universe #Cosmos #Entdeckung #Astronomy #RadioAstronomy #Pulsars #MPIfR #Science #Space #Cosmos #Astrophysics

Entdeckt unsere neue Pressemitteilung!

Check out our new press release!

➡️ https://www.mpifr-bonn.mpg.de/pressemeldungen/2026/radiosignale-aus-dem-randbereich-extremer-sterne

#Astrophysik #Radioastronomie #Pulsare #MPIfR #Wissenschaft #Universe #Cosmos #Entdeckung #Astronomy #RadioAstronomy #Pulsars #MPIfR #Science #Space #Cosmos #Astrophysics

Entdeckt unsere neue Pressemitteilung!

Check out our new press release!

➡️ https://www.mpifr-bonn.mpg.de/pressemeldungen/2026/radiosignale-aus-dem-randbereich-extremer-sterne

#Astrophysik #Radioastronomie #Pulsare #MPIfR #Wissenschaft #Universe #Cosmos #Entdeckung #Astronomy #RadioAstronomy #Pulsars #MPIfR #Science #Space #Cosmos #Astrophysics

https://www.europesays.com/ie/401392/ NASA’s Hubble Revisits Crab Nebula to Track 25 Years of Expansion #astrophysics #AstrophysicsDivision #CrabNebula #Éire #EmissionNebulae #GoddardSpaceFlightCenter #HubbleSpaceTelescope #IE #Ireland #Nebulae #NeutronStars #Pulsars #Science #Space #SupernovaRemnants

NASA’s Hubble Revisits Crab Nebula to Track 25 Years of Expansion

A quarter-century after its first observations of the full Crab Nebula, NASA’s Hubble Space Telescope has taken a…
#NewsBeep #News #Science #Astrophysics #AstrophysicsDivision #CrabNebula #EmissionNebulae #GB #GoddardSpaceFlightCenter #HubbleSpaceTelescope #Nebulae #NeutronStars #Pulsars #SupernovaRemnants #UK #UnitedKingdom
https://www.newsbeep.com/uk/491827/

https://www.europesays.com/uk/846102/ NASA’s Hubble Revisits Crab Nebula to Track 25 Years of Expansion #Astrophysics #AstrophysicsDivision #CrabNebula #EmissionNebulae #GoddardSpaceFlightCenter #HubbleSpaceTelescope #Nebulae #NeutronStars #pulsars #Science #SupernovaRemnants #UK #UnitedKingdom

NASA’s Hubble Revisits Crab Nebula to Track 25 Years of Expansion https://science.nasa.gov/missions/hubble/nasas-hubble-revisits-crab-nebula-to-track-25-years-of-expansion/ #NASA #Astrophysics #AstrophysicsDivision #CrabNebula #EmissionNebulae #GoddardSpaceFlightCenter #HubbleSpaceTelescope #Nebulae #NeutronStars #Pulsars #SupernovaRemnants

NASA’s Hubble Revisits Crab Nebula to Track 25 Years of Expansion https://science.nasa.gov/missions/hubble/nasas-hubble-revisits-crab-nebula-to-track-25-years-of-expansion/ #NASA #Astrophysics #AstrophysicsDivision #CrabNebula #EmissionNebulae #GoddardSpaceFlightCenter #HubbleSpaceTelescope #Nebulae #NeutronStars #Pulsars #SupernovaRemnants

NASA’s Hubble Revisits Crab Nebula to Track 25 Years of Expansion https://science.nasa.gov/missions/hubble/nasas-hubble-revisits-crab-nebula-to-track-25-years-of-expansion/ #NASA #Astrophysics #AstrophysicsDivision #CrabNebula #EmissionNebulae #GoddardSpaceFlightCenter #HubbleSpaceTelescope #Nebulae #NeutronStars #Pulsars #SupernovaRemnants

NASA’s Hubble Revisits Crab Nebula to Track 25 Years of Expansion https://science.nasa.gov/missions/hubble/nasas-hubble-revisits-crab-nebula-to-track-25-years-of-expansion/ #NASA #Astrophysics #AstrophysicsDivision #CrabNebula #EmissionNebulae #GoddardSpaceFlightCenter #HubbleSpaceTelescope #Nebulae #NeutronStars #Pulsars #SupernovaRemnants

A huge cloud of #darkmatter may be lurking near our #solarsystem
Researchers found what seems to be a cloud of dark matter about 60 million times mass of sun in our galactic neighbourhood
Dark matter interacts with regular matter via gravity, so if a dark matter sub-halo is near pair of #pulsars, it should stretch their orbits slightly. That is exactly what Chakrabarti and colleagues found a little more than 3000 light years from our solar system.
https://www.newscientist.com/article/2513924-a-huge-cloud-of-dark-matter-may-be-lurking-near-our-solar-system/
https://archive.is/kp6aK

It's the anniversary of Jocelyn Bell Burnell's 1968 paper (later she'd be robbed of the #Nobel physics prize by her supervisor).

That iconic picture of her always reminds me of this modern meme, which incidentally would've been an appropriate reaction to the Nobel committee's behaviour:

#pulsars #memes #physics

📡 LGM-1

On this day 58 years ago (Feb 24, 1968), Nature published the announcement of pulsar discovery! Jocelyn Bell Burnell detected regular pulses with a 1.337s period from Vulpecula – source CP 1919, jokingly nicknamed LGM-1 (Little Green Men).

The discovery confirmed the existence of neutron stars. The 1974 Nobel went to Hewish & Ryle – Bell Burnell was excluded. In 2018 she received the Breakthrough Prize and donated the full $3M to scholarships.

#astronomy #radioastronomy #pulsars

SNRs are classified by their emission structure. Shell-type remnants show limb-brightened radio emission. Crab-like remnants are pulsar wind nebulae. Composite remnants combine both a shell and a central pulsar wind nebula.

#SNR #Pulsars #Astronomy

New in the #VirtualObservatory: “Pulsar Vela X-1 Pulse-to-Pulse Approach” by Du Y.-J. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A175
#GammaRayAstronomy #Accretion #Pulsars

New in the #VirtualObservatory: “Pulsar Vela X-1 Pulse-to-Pulse Approach” by Du Y.-J. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A175
#GammaRayAstronomy #Accretion #Pulsars

New in the #VirtualObservatory: “Pulsar Vela X-1 Pulse-to-Pulse Approach” by Du Y.-J. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A175
#GammaRayAstronomy #Accretion #Pulsars

New in the #VirtualObservatory: “Pulsar Vela X-1 Pulse-to-Pulse Approach” by Du Y.-J. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A175
#GammaRayAstronomy #Accretion #Pulsars

New in the #VirtualObservatory: “Spectral index distrib. of RACS ATNF pulsars” by Anumarlapudi A. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/956/28
#Interferometry #Surveys #RadioSources #Pulsars

Supplement to the Open Journal of Astrophysics – “Pulsar Science with the SKAO”

It’s been a busy day at the Open Journal of Astrophysics as we’ve published 12 related papers in the form of our first ever Supplement; officially it is Vol. 8 Supplement Issue 1. The idea of a Supplement is to publish a set of related papers together. I imagine it might be of interest for publishing conference proceedings, etc.

The topic of this Supplement is Pulsar Science with the Square Kilometre Array Observatory and it includes updates to the Science Case for the SKAO, the previous version of which is 10 years old. All the papers are indendependently peer-reviewed, which took some organizing and a lot of time because many potential referees are themselves members of the SKA Pulsar Science Working Group! Anyway, the final versions of all the papers hit the arXiv this morning so I published them all today.

Rather than include all 12 papers in tomorrow’s Saturday update I decided just to show the overlay for the overview of the special issue, which is here:

The following paragraph describes the content of the supplement and includes links to the other 11 papers in the issue.

The large instantaneous sensitivity, a wide frequency coverage and flexible observation modes with large number of beams in the sky are the main features of the upcoming SKA observatory’s two telescopes, the SKA-Low and the SKA-Mid, which are located on two different continents. Owing to these capabilities, the SKAO telescopes are going to be a game-changer for radio astronomy in general and pulsar astronomy in particular. The eleven articles in this special issue on pulsar science with the SKA Observatory describe its impact on different areas of pulsar science. Phase 1 of the rollout of the SKAO telescope is likely to double the known pulsar population in new surveys described in the first three papers (Keane et al. 2025; Abbate et al. 2025; Bagchi et al. 2025). These new discoveries will improve our understanding of the dynamics, evolution and gas content of globular clusters and the black hole at the centre of the Milky Way galaxy apart from increasing the samples for each of different kinds of radio emitting neutron stars (Levin et al. 2025). The larger population sample will enhance our understanding of the magneto-ionic interstellar medium (Tiburzi et al. 2025; Xu et al. 2025), the pulsar magnetosphere (Oswald et al. 2025) and pulsar wind nebulae (Gelfand et al. 2025). Moreover, the discovery of exotic neutron star systems will test gravity theory ever more stringently (Krishnan et al. 2025) and will probe fundamental physics at sub-atomic level (Basu et al. 2025). Finally, this enhanced sample is likely to make the sky portrait sharper in nano-Hertz gravitational waves impacting on our understanding of the Universe in a fundamental way (Shannon et al. 2025). In summary, the papers in this special issue describe the way the upcoming SKA Observatory’s telescopes address fundamental physics through the study of pulsars and gravitational waves.

#DiamondOpenAccessPublishing #OpenAccessPublishing #OpenJournalOfAstrophysics #PulsarScience #pulsars #SKAO #SquareKilometreArray #SquareKilometreArrayObservatory #TheOpenJournalOfAstrophysics

Supplement to the Open Journal of Astrophysics – “Pulsar Science with the SKAO”

It’s been a busy day at the Open Journal of Astrophysics as we’ve published 12 related papers in the form of our first ever Supplement; officially it is Vol. 8 Supplement Issue 1. The idea of a Supplement is to publish a set of related papers together. I imagine it might be of interest for publishing conference proceedings, etc.

The topic of this Supplement is Pulsar Science with the Square Kilometre Array Observatory and it includes updates to the Science Case for the SKAO, the previous version of which is 10 years old. All the papers are indendependently peer-reviewed, which took some organizing and a lot of time because many potential referees are themselves members of the SKA Pulsar Science Working Group! Anyway, the final versions of all the papers hit the arXiv this morning so I published them all today.

Rather than include all 12 papers in tomorrow’s Saturday update I decided just to show the overlay for the overview of the special issue, which is here:

The following paragraph describes the content of the supplement and includes links to the other 11 papers in the issue.

The large instantaneous sensitivity, a wide frequency coverage and flexible observation modes with large number of beams in the sky are the main features of the upcoming SKA observatory’s two telescopes, the SKA-Low and the SKA-Mid, which are located on two different continents. Owing to these capabilities, the SKAO telescopes are going to be a game-changer for radio astronomy in general and pulsar astronomy in particular. The eleven articles in this special issue on pulsar science with the SKA Observatory describe its impact on different areas of pulsar science. Phase 1 of the rollout of the SKAO telescope is likely to double the known pulsar population in new surveys described in the first three papers (Keane et al. 2025; Abbate et al. 2025; Bagchi et al. 2025). These new discoveries will improve our understanding of the dynamics, evolution and gas content of globular clusters and the black hole at the centre of the Milky Way galaxy apart from increasing the samples for each of different kinds of radio emitting neutron stars (Levin et al. 2025). The larger population sample will enhance our understanding of the magneto-ionic interstellar medium (Tiburzi et al. 2025; Xu et al. 2025), the pulsar magnetosphere (Oswald et al. 2025) and pulsar wind nebulae (Gelfand et al. 2025). Moreover, the discovery of exotic neutron star systems will test gravity theory ever more stringently (Krishnan et al. 2025) and will probe fundamental physics at sub-atomic level (Basu et al. 2025). Finally, this enhanced sample is likely to make the sky portrait sharper in nano-Hertz gravitational waves impacting on our understanding of the Universe in a fundamental way (Shannon et al. 2025). In summary, the papers in this special issue describe the way the upcoming SKA Observatory’s telescopes address fundamental physics through the study of pulsars and gravitational waves.

#DiamondOpenAccessPublishing #OpenAccessPublishing #OpenJournalOfAstrophysics #PulsarScience #pulsars #SKAO #SquareKilometreArray #SquareKilometreArrayObservatory #TheOpenJournalOfAstrophysics

#Pulsars rotate at a very regular period and are very stable. When converted to 🔊sound, they can act as a sort of backing beat 🥁to be used in music and tracks.

With the wide variety of pulsars, each with its own spin period, and thus, its own beat, musicians and scientists can work together to get the music flowing. Maybe use it as the base of a house track, played by one of the world’s leading DJs at a 20,000-strong crowd festival.

'PSR J1056-6258' has a 142 beats-per-minute (BPM) spin period, so it would be perfectly suited to go well with #Kylie #Minogue’s ‘Padam Padam’, #Britney #Spears ‘Toxic’, #Blondie’s ‘Call Me’ and #Mumford & #Sons ‘The Cave’.

French composer #Gerard #Grisey included a pulsar as one of the percussionists in his piece, 'Le Noir de l’Étoile'.

https://spaceaustralia.com/news/rocking-sounds-pulsar-beats

NASA’s Webb Observes Exoplanet Whose Composition Defies Explanation https://science.nasa.gov/missions/webb/nasas-webb-observes-exoplanet-whose-composition-defies-explanation/ #NASA #Astrophysics #ExoplanetAtmosphere #Exoplanets #GoddardSpaceFlightCenter #JamesWebbSpaceTelescopeJWST #NeutronStars #PlanetaryEnvironmentsAtmospheres #Pulsars #ScienceResearch

NASA’s Webb Observes Exoplanet Whose Composition Defies Explanation https://science.nasa.gov/missions/webb/nasas-webb-observes-exoplanet-whose-composition-defies-explanation/ #NASA #ExoplanetAtmosphere #Exoplanets #JamesWebbSpaceTelescopeJWST #NeutronStars #PlanetaryEnvironmentsAtmospheres #Pulsars

New in the #VirtualObservatory: “SpiderCat, Compact Binary Millisecond Pulsars” by Koljonen K.I.I. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/994/8
#GammaRayAstronomy #Pulsars #XRayBinaryStars

🆕 New selected research highlight ✨

Einstein@Home probes the Galactic center gamma-ray glow 🌌

The volunteer computing project @einsteinathome searched for members of a proposed, hidden millisecond pulsar population near the center of the Milky Way and discovered four new pulsars.

ℹ️ https://www.aei.mpg.de/1318665/einstein-home-probes-the-galactic-center-gamma-ray-glow

📄 https://iopscience.iop.org/article/10.3847/1538-4357/ae0b5c [Open Access publication in The Astrophysical Journal]

#CitizenScience #Astronomy #Pulsars #Astrophysics #Physics #Discovery #OpenAccess

Einstein@Home probes the Galactic center gamma-ray glow

The results from an @einsteinathome search for a proposed, hidden millisecond pulsar population near the center of the Milky Way have been published in The Astrophysical Journal today.

The results include the discovery of four previously unknown gamma-ray pulsars.

📄 Publication: https://iopscience.iop.org/article/10.3847/1538-4357/ae0b5c

💬 News item on our homepage: https://einsteinathome.org/de/content/einsteinhome-probes-galactic-center-gamma-ray-glow

Many thanks to all of our volunteers whose computing time contributions made this work possible!

#CitizenScience #Astronomy #Pulsars #Astrophysics #Physics #Discovery

Well, here's some very exciting news!

I've been wanting to share this for a few months, but had to await the pre-print to drop.

A NEW GLITCH EVENT ON A MILLISECOND PULSAR HAS BEEN OBSERVED!

These events are extremely rare - only two others since MSPs were discovered.

Glitches are more commonly observed in the younger, canonical pulsar population as MSPs are much older and should have sorted out these types of disruptive events over their evolution.

That's what makes them so stable!

OR ... maybe they're not as stable as we once thought ...

This new paper predicts that we should see a glitch per MSP once every 400 years or so.

Glitches, profile changes .... as our instruments become more sensitive and datasets expand in time, we're starting to see that MSPs might not be as stable as we once thought ...

That's really important!

https://www.spaceaustralia.com/news/new-glitch-millisecond-pulsar

📸 NASA SVS

#SpaceAustralia #RadioAstronomy #Astrodon #Astrophysics #Science #Pulsars

I am so very excited to share this story. Def. a career highlight!

Having the opportunity to sit down and have a one-on-one candid chat with the woman who discovered pulsars and changed the course of astrophysics, leading to me being extremely passionate about this topic and eventually moving into a career of pulsar astronomy. Yeah, this was big.

I hope you enjoy this interview, where Prof. Bell Burnell offers some personal insight into the history of the big discovery as well as the legacy of one of astronomy’s most iconic and influential figures.

What an honour it is to tell this story!

https://www.spaceaustralia.com/feature/interview-dame-professor-jocelyn-bell-burnell

📸 University of Cambridge

#SpaceAustralia #RadioAstronomy #Pulsars #JocelynBellBurnell #Astrophysics #Science #Astrodon

In 2018 she was awarded the $3 million Breakthrough Prize in Fundamental Physics for her discovery of #pulsars & leadership in science. She donated money to the IOP for PhD scholarships for underrepresented people including women, ethnic minorities & refugee students in physics!

https://minouette.etsy.com/listing/178998272

🧵5/5

Today was a good day. I got to meet one of my heroes.

Got to spend one-on-one time with the woman who discovered pulsars, Dame Prof. Jocelyn Bell Burnell, and interview her for a #SpaceAustralia article 🥺🥺🥺

And she signed a copy of my first-ever PhD paper which I will now have framed and remember forever! 😭😭😭

She is the most humble, nicest person. Just kindness, personified. And such an extremely interesting life - as you can imagine.

I'll publish my article and interview with her in about 12 hours from now (around 8:30am Sydney time) - so keep an eye out for it.

Thanks to Manisha Caleb who took this photo of us.

#Pulsars #RadioAstronomy #JocelynBellBurnell #Astrodon #Science #Astrophysics

👀👀👀

Some really interesting ideas here (pre-print) from Michael Kramer and Simon Johnston (SJ works with us!).

Unlike the conventional concept of radio emissions in millisecond pulsars coming from polar caps, could they also be coming from regions where gamma-rays are emitted?!

If the idea is correct, then somehow the theorists are going to have to figure out how to get coherent emissions from outside the polar cap (which is gonna be fun). But if so we should see more MSPs!

https://arxiv.org/abs/2510.05778

#Pulsars #Astrophysics #RadioAstronomy #Astrodon

Radio emission from beyond the light cylinder in millisecond #pulsars: https://arxiv.org/abs/2510.05778 -> thread https://bsky.app/profile/cosmicrami.com/post/3m2ogyrg2qs22

@galaxy_map Why is #sirus in the center of a red circle? And also Keid system too?

And do you plan to put Black holes, Neutron Stars, #Pulsars and Magnetars in this map too?

#space, #spacemap, #astronomy, #nightsky

Our research at the Pulsar 2025 Sardinia conference

At the end of September, scientists from the @mpi_grav in Hannover presented their latest results at the Pulsar 2025 Sardinia conference. They gave a total of five talks, two lightning talks, and presented a poster.

➡️ https://sites.google.com/inaf.it/pulsar2025/home

Among other things, they reported on the latest news from Einstein@Home and our Zooniverse project “Einstein@Home: Pulsar Seekers”. In the Zooniverse project, volunteers classify pulsar candidates identified by Einstein@Home, helping to find new pulsars and distinguish them from terrestrial disturbances such as radio frequency interference.

➡️ https://www.zooniverse.org/projects/rsengar/einstein-at-home-pulsar-seekers

Thanks to all of our citizen scientists, several promising pulsar candidates have been found. Our team is now investigating these further using additional observations and public radio telescope data.

#CitizenScience #Physics #Astronomy #Conference #Pulsars

*** EXCITING NEWS ****

Dame Prof. Jocelyn Bell Burnell is coming to Sydney!

A few of us early-career scientists will be sharing our science and the stage with her.

BUT BUT BUT ... I've been granted a one-on-one interview with her for a #SpaceAustralia article!

What an honour!

I get to spend time / have a chat with the woman who discovered pulsars (the objects that I research) - and then be able to share that story with everyone.

It's a huge thing for me!

To be able to write the story, from first-hand account, of that of a Titan in my field of research / astronomy!

JBB will be in Sydney from next week and is also giving a public lecture at the University of Sydney.

Sadly, it looks like the event has already sold out for those who couldn't grab tickets, but keep an eye out for my SpaceAustralia article - will be released on 21st October!

#Pulsars #Science #RadioAstronomy #Astrophysics #JocelynBellBurnell #Astrodon

A personal milestone ✅

I’m incredibly proud to share that my first-ever, first-author paper has been accepted for publication in the Publications of the Astronomical Society of Australia (PASA)!

Last week I got to share this work with the pulsar community at the Sardinia Pulsar Conference too.

This project has been at the very heart of my PhD journey so far - a deep, four-year analysis into an unusual and still-mysterious profile change event in one of the most stable and widely used pulsars, PSR J1713+0747. It first appeared on my radar in early 2021 and, since then, it’s been a fascinating and humbling experience trying to unravel what really happened.

In pulsar timing, we rely on the long-term stability of millisecond pulsars to search for phenomena like nanohertz gravitational waves using pulsar timing arrays. But what happens when that stability falters?

This paper explores that very question - examining what changed on this millisecond pulsar, how the polarisation evolved, and what it might mean for the future of precision timing efforts as we prepare for a new generation of ultra-sensitive telescopes.

Seeing this work now out in the world - contributing to the scientific conversation is something I’ve dreamt of for a long time (the last notch to feel like I have fully moved into my science career!). I hope it helps our community better understand the complex and wild behaviour of these exotic stellar clocks.

Read my feature article on SpaceAustralia.com below - and if you have questions about the research, I’d love to chat!

https://www.spaceaustralia.com/feature/pulsar-threw-tantrum

📸 R. Mandow et al. 2025

#Pulsars #RadioAstronomy #Astrophysics #SpaceAustralia #Astrodon

🎉 A new paper with Einstein@Home gamma-ray pulsar discoveries 🔭

The new publication “Einstein@Home Searches for Gamma-ray Pulsars in the Inner Galaxy” was accepted for publication in The Astrophysical Journal and is posted on the arXiv preprint server today.

📄 https://arxiv.org/abs/2509.21307

The international science team reports the discovery of four previously unknown gamma-ray pulsars towards the direction of the Galactic Center. Most likely the four discoveries are foreground sources from the Galactic disk.

🙏 We thank our volunteers, without the support of whom this research could not have happened.

All of our publications and PhD theses related to the project at https://einsteinathome.org/science/publications.

#Pulsars #NeutronStars #FermiLAT #GammaRays #CitizenScience

For day 22 of #sciArtSeptember prompt fellowship, I am sharing my portrait of #astrophysicist Jocelyn Bell Burnell, who took her $3 million Breakthrough Prize in Fundamental Physics for her discovery of #pulsars & leadership in science and donated money to the Institute of Physics for PhD scholarships for underrepresented people including women, ethnic minorities & refugee students in physics! #linocut #printmaking #histsci

As a grad student in ‘67 she discovered the 1st radio pulsar, a 🧵

👀👀👀👀

Super neat preprint! 📡

A rare, hot-Jupiter exoplanet orbits the pulsar PSR J2322-2650.

Astronomers used #JWST to observe it across the full orbit, and found its atmosphere rich in carbon AND it having a strong westward wind! 🤯

So glad that people are using JWST to look at the pulsar planets, esp. since the pulsar is not going to be visible at the JWST wavelengths.

These things are orbiting so close to the pulsar that they are being ablated (spider pulsar!), and one side of them is gonna glow more than the other side.

The first exoplanets discovered were pulsar planets!

They are, however, extremely rare because to form a pulsar you need a supernova, and so things get messy.

Here's an article I wrote about them a little while back on #SpaceAustralia

https://www.spaceaustralia.com/news/science-talk-what-are-pulsar-planets

#Pulsars #Astrophysics #Science #Astrodon #RadioAstronomy #JWST

I built a more accurate Galactic GPS for aliens to find us!

In the 1970s, the Pioneer and Voyager spacecraft were launched into deep space - each carrying a message from Earth in the form of plaques and golden records. These included a now-famous diagram: the pulsar map, originally proposed by Carl Sagan, Linda Salzman Sagan, and Frank Drake.

It uses the positions and spin periods of 14 pulsars to show where we are in the galaxy, effectively a cosmic return address.

But there’s a catch: the original map used canonical pulsars, which we now know can glitch and show timing instabilities. Back then, millisecond pulsars hadn’t yet been discovered (they came in the early '80s), so they weren’t included.

As someone studying millisecond pulsars and their long-term timing stability for my PhD, I decided to write some code to rebuild this iconic map - with a little upgrade.

Enter: the Millisecond Pulsar Map.

This version features:

- A top-down view of the Galaxy, with a central measuring bar showing our distance (8 kiloparsecs) from the Galactic Centre.
- Radial lines showing the distance to each millisecond pulsar. These can be measured against the central measuring bar to work out this distance
- Binary encodings for each pulsar's spin period and spin-down rate. These parameters will remain much more stable over the long term.
- A decoding scale to interpret the binary inscriptions.

With 40+ years of high-precision timing data, millisecond pulsars are far more stable than their slower cousins - making them ideal for building a map that could stand the test of cosmic time.

This also highlights how millisecond pulsars could be used as an intergalactic GPS network (because these stable pulsars are like cosmic clocks distributed across the sky). This might be an application for future spacecraft to navigate around the Solar System. Have a read of this article for how we are already building this technology now: https://www.spaceaustralia.com/feature/breaking-free-shackles-terrestrial-time

So, if some distant civilisation stumbles upon this new pulsar map ... well, they’ll know exactly where to find us.

The question is: do we really want to leave our full galactic home address out there?!

#Pulsars #RadioAstronomy #Astrophysics #GPS #Astrodon

Reaching Out https://www.nasa.gov/image-article/reaching-out/ #NASA #Nebulae #Pulsars