#lofar — 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/hu/25392/ Európa méretű teleszkóppal figyelték az égboltot, 13,7 millió láthatatlan objektumot találtak #csillagászat #EU #Európa #Europe #Hungarian #LOFAR #Magyar #megfigyelés #Tudomány #űrkutatás

Die bislang größte Radio-Karte des Himmels zeigt 13,7 Millionen kosmische Objekte, die so normalerweise unsichtbar sind. Dahinter stecken über 18,6 Petabyte Daten und ein Jahrzehnt Arbeit. #LOFAR #Astronomie https://winfuture.de/news,157458.html?utm_source=Mastodon&utm_medium=ManualStatus&utm_campaign=SocialMedia

#JUWELS supports LOFAR’s most detailed map of the northern sky🌠

13.7M cosmic radio sources catalogued – from supermassive black holes to rare supernova remnants. 13,000 hrs of observations processed across multiple European HPC centres. 💻✨

📢Read the full story in our JSC news: https://www.fz-juelich.de/en/jsc/news/news-items/news-flashes/2026/juwels-enables-most-detailed-map-of-the-northern-sky-to-date #FZJ #LOFAR #RadioAstronomy #HPC #Astronomy #DataScience #ScienceInEurope

Image Credits (video): © Forschungszentrum Jülich / Ralf-Uwe Limbach & © Maya Horton & © LOFAR Surveys Collaboration

#JUWELS supports LOFAR’s most detailed map of the northern sky🌠

13.7M cosmic radio sources catalogued – from supermassive black holes to rare supernova remnants. 13,000 hrs of observations processed across multiple European HPC centres. 💻✨

📢Read the full story in our JSC news: https://www.fz-juelich.de/en/jsc/news/news-items/news-flashes/2026/juwels-enables-most-detailed-map-of-the-northern-sky-to-date #FZJ #LOFAR #RadioAstronomy #HPC #Astronomy #DataScience #ScienceInEurope

Image Credits (video): © Forschungszentrum Jülich / Ralf-Uwe Limbach & © Maya Horton & © LOFAR Surveys Collaboration

#JUWELS supports LOFAR’s most detailed map of the northern sky🌠

13.7M cosmic radio sources catalogued – from supermassive black holes to rare supernova remnants. 13,000 hrs of observations processed across multiple European HPC centres. 💻✨

📢Read the full story in our JSC news: https://www.fz-juelich.de/en/jsc/news/news-items/news-flashes/2026/juwels-enables-most-detailed-map-of-the-northern-sky-to-date #FZJ #LOFAR #RadioAstronomy #HPC #Astronomy #DataScience #ScienceInEurope

Image Credits (video): © Forschungszentrum Jülich / Ralf-Uwe Limbach & © Maya Horton & © LOFAR Surveys Collaboration

#JUWELS supports LOFAR’s most detailed map of the northern sky🌠

13.7M cosmic radio sources catalogued – from supermassive black holes to rare supernova remnants. 13,000 hrs of observations processed across multiple European HPC centres. 💻✨

📢Read the full story in our JSC news: https://www.fz-juelich.de/en/jsc/news/news-items/news-flashes/2026/juwels-enables-most-detailed-map-of-the-northern-sky-to-date #FZJ #LOFAR #RadioAstronomy #HPC #Astronomy #DataScience #ScienceInEurope

Image Credits (video): © Forschungszentrum Jülich / Ralf-Uwe Limbach & © Maya Horton & © LOFAR Surveys Collaboration

#JUWELS supports LOFAR’s most detailed map of the northern sky🌠

13.7M cosmic radio sources catalogued – from supermassive black holes to rare supernova remnants. 13,000 hrs of observations processed across multiple European HPC centres. 💻✨

📢Read the full story in our JSC news: https://www.fz-juelich.de/en/jsc/news/news-items/news-flashes/2026/juwels-enables-most-detailed-map-of-the-northern-sky-to-date #FZJ #LOFAR #RadioAstronomy #HPC #Astronomy #DataScience #ScienceInEurope

Image Credits (video): © Forschungszentrum Jülich / Ralf-Uwe Limbach & © Maya Horton & © LOFAR Surveys Collaboration

🌌 13,7 Millionen Radioquellen: Das unsichtbare Universum kartiert

Das #LOFAR-Netzwerk hat mit LoTSS-DR3 die bisher umfassendste Radio-Himmelskarte veröffentlicht. 📡 Sie macht Phänomene sichtbar, die für optische Teleskope verborgen bleiben – von gewaltigen Jets Schwarzer Löcher bis zur Geburt neuer Sterne.

Möglich wurde dies durch Rechenpower aus #Jülich:
🖥️ Der Supercomputer #JUWELS am @[email protected] hat einen erheblichen Teil der 13.000 Beobachtungsstunden verarbeitet.

🔗 https://www.fz-juelich.de/de/aktuelles/news/meldungen/2026/lofar-radio-himmelskarte

🌌 13,7 Millionen Radioquellen: Das unsichtbare Universum kartiert

Das #LOFAR-Netzwerk hat mit LoTSS-DR3 die bisher umfassendste Radio-Himmelskarte veröffentlicht. 📡 Sie macht Phänomene sichtbar, die für optische Teleskope verborgen bleiben – von gewaltigen Jets Schwarzer Löcher bis zur Geburt neuer Sterne.

Möglich wurde dies durch Rechenpower aus #Jülich:
🖥️ Der Supercomputer #JUWELS am @[email protected] hat einen erheblichen Teil der 13.000 Beobachtungsstunden verarbeitet.

🔗 https://www.fz-juelich.de/de/aktuelles/news/meldungen/2026/lofar-radio-himmelskarte

🌌 13,7 Millionen Radioquellen: Das unsichtbare Universum kartiert

Das #LOFAR-Netzwerk hat mit LoTSS-DR3 die bisher umfassendste Radio-Himmelskarte veröffentlicht. 📡 Sie macht Phänomene sichtbar, die für optische Teleskope verborgen bleiben – von gewaltigen Jets Schwarzer Löcher bis zur Geburt neuer Sterne.

Möglich wurde dies durch Rechenpower aus #Jülich:
🖥️ Der Supercomputer #JUWELS am @[email protected] hat einen erheblichen Teil der 13.000 Beobachtungsstunden verarbeitet.

🔗 https://www.fz-juelich.de/de/aktuelles/news/meldungen/2026/lofar-radio-himmelskarte

🌌 13,7 Millionen Radioquellen: Das unsichtbare Universum kartiert

Das #LOFAR-Netzwerk hat mit LoTSS-DR3 die bisher umfassendste Radio-Himmelskarte veröffentlicht. 📡 Sie macht Phänomene sichtbar, die für optische Teleskope verborgen bleiben – von gewaltigen Jets Schwarzer Löcher bis zur Geburt neuer Sterne.

Möglich wurde dies durch Rechenpower aus #Jülich:
🖥️ Der Supercomputer #JUWELS am @[email protected] hat einen erheblichen Teil der 13.000 Beobachtungsstunden verarbeitet.

🔗 https://www.fz-juelich.de/de/aktuelles/news/meldungen/2026/lofar-radio-himmelskarte

🌌 13,7 Millionen Radioquellen: Das unsichtbare Universum kartiert

Das #LOFAR-Netzwerk hat mit LoTSS-DR3 die bisher umfassendste Radio-Himmelskarte veröffentlicht. 📡 Sie macht Phänomene sichtbar, die für optische Teleskope verborgen bleiben – von gewaltigen Jets Schwarzer Löcher bis zur Geburt neuer Sterne.

Möglich wurde dies durch Rechenpower aus #Jülich:
🖥️ Der Supercomputer #JUWELS am @[email protected] hat einen erheblichen Teil der 13.000 Beobachtungsstunden verarbeitet.

🔗 https://www.fz-juelich.de/de/aktuelles/news/meldungen/2026/lofar-radio-himmelskarte

La più grande mappatura radioastronomica mai realizzata traccia una mappa dell'universo con un livello di dettaglio senza precedenti

#lofar @astronomia

Una collaborazione internazionale che utilizza il Low Frequency Array (LOFAR) ha pubblicato una mappa del cielo radio di eccezionale dettaglio, rivelando 13,7 milioni di sorgenti cosmiche e fornendo il censimento più completo finora dei buchi neri supermassicci in fase di crescita attiva.

https://umbertogaetani.substack.com/p/la-piu-grande-mappatura-radioastronomica

#JMU:
"
Umfassende Karte des Radiohimmels veröffentlicht

Das Radioteleskop LOFAR hat die bislang detaillierteste Radiokarte des Nordhimmels geliefert. Sie eröffnet neue Einblicke in aktive Galaxien, Sternentstehung und seltene Himmelsobjekte.
"
https://www.uni-wuerzburg.de/aktuelles/pressemitteilungen/single/news/radiohimmel-lotss/

19.2.2026

#ASTRON #Astronomie #FZJülich #Himmelsdurchmusterung #Himmelskarte #JUWELS #LOFAR #LoTSS #Nordhimmel #Radioantronomie #Radioteleskop #Supercomputing

#JMU:
"
Umfassende Karte des Radiohimmels veröffentlicht

Das Radioteleskop LOFAR hat die bislang detaillierteste Radiokarte des Nordhimmels geliefert. Sie eröffnet neue Einblicke in aktive Galaxien, Sternentstehung und seltene Himmelsobjekte.
"
https://www.uni-wuerzburg.de/aktuelles/pressemitteilungen/single/news/radiohimmel-lotss/

19.2.2026

#ASTRON #Astronomie #FZJülich #Himmelsdurchmusterung #Himmelskarte #JUWELS #LOFAR #LoTSS #Nordhimmel #Radioantronomie #Radioteleskop #Supercomputing

#JMU:
"
Umfassende Karte des Radiohimmels veröffentlicht

Das Radioteleskop LOFAR hat die bislang detaillierteste Radiokarte des Nordhimmels geliefert. Sie eröffnet neue Einblicke in aktive Galaxien, Sternentstehung und seltene Himmelsobjekte.
"
https://www.uni-wuerzburg.de/aktuelles/pressemitteilungen/single/news/radiohimmel-lotss/

19.2.2026

#ASTRON #Astronomie #FZJülich #Himmelsdurchmusterung #Himmelskarte #JUWELS #LOFAR #LoTSS #Nordhimmel #Radioantronomie #Radioteleskop #Supercomputing

#JMU:
"
Umfassende Karte des Radiohimmels veröffentlicht

Das Radioteleskop LOFAR hat die bislang detaillierteste Radiokarte des Nordhimmels geliefert. Sie eröffnet neue Einblicke in aktive Galaxien, Sternentstehung und seltene Himmelsobjekte.
"
https://www.uni-wuerzburg.de/aktuelles/pressemitteilungen/single/news/radiohimmel-lotss/

19.2.2026

#ASTRON #Astronomie #FZJülich #Himmelsdurchmusterung #Himmelskarte #JUWELS #LOFAR #LoTSS #Nordhimmel #Radioantronomie #Radioteleskop #Supercomputing

#JMU:
"
Umfassende Karte des Radiohimmels veröffentlicht

Das Radioteleskop LOFAR hat die bislang detaillierteste Radiokarte des Nordhimmels geliefert. Sie eröffnet neue Einblicke in aktive Galaxien, Sternentstehung und seltene Himmelsobjekte.
"
https://www.uni-wuerzburg.de/aktuelles/pressemitteilungen/single/news/radiohimmel-lotss/

19.2.2026

#ASTRON #Astronomie #FZJülich #Himmelsdurchmusterung #Himmelskarte #JUWELS #LOFAR #LoTSS #Nordhimmel #Radioantronomie #Radioteleskop #Supercomputing

The #LOFAR Two-metre Sky Survey - VII. Third Data Release: https://arxiv.org/abs/2602.15949 -> Largest Ever Radio Sky Survey Maps the Universe in Unprecedented Detail: https://www.ru.nl/en/research/research-news/largest-ever-radio-sky-survey-maps-the-universe-in-unprecedented-detail (see the ALT text for what the three sample images show).

Grootste radio-survey ooit brengt het heelal in ongekend detail in kaart #lofar

https://www.astronomie.nl/nieuws/grootste-radio-survey-ooit-brengt-het-heelal-in-ongekend-detail-in-kaart-4801

English:

Largest Ever Radio Sky Survey Maps the Universe in Unprecedented Detail

https://www.astronomie.nl/nieuws/en/largest-ever-radio-sky-survey-maps-the-universe-in-unprecedented-detail-4801

Verwoestende sterstorm waargenomen op rode dwergster
Een eerste detectie ooit van een coronale massa-ejectie (CME) op een kleine rode dwergster kan grote gevolgen hebben voor leven
#astron #CME #CoronalePlasmaEjectie #LOFAR #plasmawolk #RodeDwerg #ska #XMMNewton
https://www.kuuke.nl/verwoestende-sterstorm-waargenomen-op-rode-dwergster/

Verwoestende sterstorm waargenomen op rode dwergster
Een eerste detectie ooit van een coronale massa-ejectie (CME) op een kleine rode dwergster kan grote gevolgen hebben voor leven
#astron #CME #CoronalePlasmaEjectie #LOFAR #plasmawolk #RodeDwerg #ska #XMMNewton
https://www.kuuke.nl/verwoestende-sterstorm-waargenomen-op-rode-dwergster/

Verwoestende sterstorm waargenomen op rode dwergster
Een eerste detectie ooit van een coronale massa-ejectie (CME) op een kleine rode dwergster kan grote gevolgen hebben voor leven
#astron #CME #CoronalePlasmaEjectie #LOFAR #plasmawolk #RodeDwerg #ska #XMMNewton
https://www.kuuke.nl/verwoestende-sterstorm-waargenomen-op-rode-dwergster/

Verwoestende sterstorm waargenomen op rode dwergster
Een eerste detectie ooit van een coronale massa-ejectie (CME) op een kleine rode dwergster kan grote gevolgen hebben voor leven
#astron #CME #CoronalePlasmaEjectie #LOFAR #plasmawolk #RodeDwerg #ska #XMMNewton
https://www.kuuke.nl/verwoestende-sterstorm-waargenomen-op-rode-dwergster/

Verwoestende sterstorm waargenomen op rode dwergster
Een eerste detectie ooit van een coronale massa-ejectie (CME) op een kleine rode dwergster kan grote gevolgen hebben voor leven
#astron #CME #CoronalePlasmaEjectie #LOFAR #plasmawolk #RodeDwerg #ska #XMMNewton
https://www.kuuke.nl/verwoestende-sterstorm-waargenomen-op-rode-dwergster/

https://www.europesays.com/ie/187044/ Our Solar System is Moving More Than Three Times Faster than Expected #Anisotropy #Dipole #Éire #Galaxy #IE #Ireland #LOFAR #MilkyWay #RadioGalaxy #Science #SolarSystem #Space #speed #StandardModel #universe

#UniBielefeld:
"
Unser Sonnensystem ist schneller als gedacht
"
".. Frage gehört zu den grundlegenden Tests unseres kosmologischen Verständnisses. .. Forschungsteam um den Astrophysiker Lukas Böhme von der Universität Bielefeld hat .. neue Antworten gefunden ..stellen das etablierte Standardmodell der Kosmologie vor eine Herausforderung .."

https://aktuell.uni-bielefeld.de/2025/11/13/unser-sonnensystem-ist-schneller-als-gedacht/

13.11.2025

#Astrophysik #IR #Kosmologie #LOFAR #Quasar #Radioastronomie #Radiogalaxie #Sonnensystem #Standardmodell #Universum

#UniBielefeld:
"
Unser Sonnensystem ist schneller als gedacht
"
".. Frage gehört zu den grundlegenden Tests unseres kosmologischen Verständnisses. .. Forschungsteam um den Astrophysiker Lukas Böhme von der Universität Bielefeld hat .. neue Antworten gefunden ..stellen das etablierte Standardmodell der Kosmologie vor eine Herausforderung .."

https://aktuell.uni-bielefeld.de/2025/11/13/unser-sonnensystem-ist-schneller-als-gedacht/

13.11.2025

#Astrophysik #IR #Kosmologie #LOFAR #Quasar #Radioastronomie #Radiogalaxie #Sonnensystem #Standardmodell #Universum

https://www.europesays.com/nl/57085/ Het zonnestelsel raast veel sneller door de ruimte dan verwacht #astrofysica #astronomen #Dutch #kosmologie #LOFAR #LowFrequencyArray #Nederland #Nederlanden #Nederlands #Netherlands #NL #RadiostralendeSterrenstelsels #radiotelescoop #Science #ScienceAndTechnology #ScienceAndTechnology #SnelheidZonnestelsel #Technologie #Technology #Wetenschap #WetenschapEnTechnologie #WetenschapTechnologie #zonnestelsel

Unser Sonnensystem bewegt sich zu schnell. Messungen anhand von Radiodaten zeigen signifikante Abweichungen zum Standardmodell. #Sonnensystem #Kosmos #Kosmologie #LOFAR #Radiogalaxien #Astronomie
https://www.scinexx.de/news/kosmos/unser-sonnensystem-bewegt-sich-zu-schnell/

Unser Sonnensystem bewegt sich zu schnell. Messungen anhand von Radiodaten zeigen signifikante Abweichungen zum Standardmodell. #Sonnensystem #Kosmos #Kosmologie #LOFAR #Radiogalaxien #Astronomie
https://www.scinexx.de/news/kosmos/unser-sonnensystem-bewegt-sich-zu-schnell/

Unser Sonnensystem bewegt sich zu schnell. Messungen anhand von Radiodaten zeigen signifikante Abweichungen zum Standardmodell. #Sonnensystem #Kosmos #Kosmologie #LOFAR #Radiogalaxien #Astronomie
https://www.scinexx.de/news/kosmos/unser-sonnensystem-bewegt-sich-zu-schnell/

Unser Sonnensystem bewegt sich zu schnell. Messungen anhand von Radiodaten zeigen signifikante Abweichungen zum Standardmodell. #Sonnensystem #Kosmos #Kosmologie #LOFAR #Radiogalaxien #Astronomie
https://www.scinexx.de/news/kosmos/unser-sonnensystem-bewegt-sich-zu-schnell/

Unser Sonnensystem bewegt sich zu schnell. Messungen anhand von Radiodaten zeigen signifikante Abweichungen zum Standardmodell. #Sonnensystem #Kosmos #Kosmologie #LOFAR #Radiogalaxien #Astronomie
https://www.scinexx.de/news/kosmos/unser-sonnensystem-bewegt-sich-zu-schnell/

#ESA:
"
First confirmed sighting of explosive burst on nearby star
"
"Astronomers using the European Space Agency’s XMM-Newton space observatory and the LOFAR telescope have definitively spotted an explosive burst of material thrown out into space by another star – a burst powerful enough to strip away the atmosphere of any unlucky planet in its path."

https://www.esa.int/Science_Exploration/Space_Science/XMM-Newton/First_confirmed_sighting_of_explosive_burst_on_nearby_star

12.11.2025

#ASTRON #Astronomie #CME #LOFAR #Radioastronomie #Röntgenastronomie #Weltraumteleskop #XMMNewton

#ESA:
"
First confirmed sighting of explosive burst on nearby star
"
"Astronomers using the European Space Agency’s XMM-Newton space observatory and the LOFAR telescope have definitively spotted an explosive burst of material thrown out into space by another star – a burst powerful enough to strip away the atmosphere of any unlucky planet in its path."

https://www.esa.int/Science_Exploration/Space_Science/XMM-Newton/First_confirmed_sighting_of_explosive_burst_on_nearby_star

12.11.2025

#ASTRON #Astronomie #CME #LOFAR #Radioastronomie #Röntgenastronomie #Weltraumteleskop #XMMNewton

#ESA:
"
First confirmed sighting of explosive burst on nearby star
"
"Astronomers using the European Space Agency’s XMM-Newton space observatory and the LOFAR telescope have definitively spotted an explosive burst of material thrown out into space by another star – a burst powerful enough to strip away the atmosphere of any unlucky planet in its path."

https://www.esa.int/Science_Exploration/Space_Science/XMM-Newton/First_confirmed_sighting_of_explosive_burst_on_nearby_star

12.11.2025

#ASTRON #Astronomie #CME #LOFAR #Radioastronomie #Röntgenastronomie #Weltraumteleskop #XMMNewton

#ESA:
"
First confirmed sighting of explosive burst on nearby star
"
"Astronomers using the European Space Agency’s XMM-Newton space observatory and the LOFAR telescope have definitively spotted an explosive burst of material thrown out into space by another star – a burst powerful enough to strip away the atmosphere of any unlucky planet in its path."

https://www.esa.int/Science_Exploration/Space_Science/XMM-Newton/First_confirmed_sighting_of_explosive_burst_on_nearby_star

12.11.2025

#ASTRON #Astronomie #CME #LOFAR #Radioastronomie #Röntgenastronomie #Weltraumteleskop #XMMNewton

#ESA:
"
First confirmed sighting of explosive burst on nearby star
"
"Astronomers using the European Space Agency’s XMM-Newton space observatory and the LOFAR telescope have definitively spotted an explosive burst of material thrown out into space by another star – a burst powerful enough to strip away the atmosphere of any unlucky planet in its path."

https://www.esa.int/Science_Exploration/Space_Science/XMM-Newton/First_confirmed_sighting_of_explosive_burst_on_nearby_star

12.11.2025

#ASTRON #Astronomie #CME #LOFAR #Radioastronomie #Röntgenastronomie #Weltraumteleskop #XMMNewton

Weekly Update from the Open Journal of Astrophysics – 26/07/2025

It’s Saturday morning again, so it’s time again for an update of papers published at the Open Journal of Astrophysics. Since the last update we have published seven new papers, which brings the number in Volume 8 (2025) up to 105, and the total so far published by OJAp up to 340. I expect we’ll pass the century for this year sometime next week. I had expected a bit of a slowdown in July, but that doesn’t seem to have happened. Anyway, with the century for the year having been achieved, the next target is 120 (the total number we published last year). At the current rate I expect us to reach that sometime in August.

The 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.

The first paper to report is “Non-equilibrium ionization in the multiphase circumgalactic medium – impact on quasar absorption-line analyses” by Suyash Kumar and Hsiao-Wen Chen (University of Chicago, USA). This was published on Tuesday 22nd July 2025 in the folder Astrophysics of Galaxies. It discusses time-dependent photoionization (TDP) models that self-consistently solve for the ionization state of rapidly cooling gas irradiated by the extragalactic ultraviolet background (UVB) and the application thereof to observed systems.

The overlay is here:

The officially-accepted version can be found on arXiv here.

The second paper of the week, also published on Tuesday 22nd July but in the folder Cosmology and Nongalactic Astrophysics, is “Do We Know How to Model Reionization?” by Nick Gnedin (University of Chicago, USA). This paper discusses the similarities and differences between the radiation fields produced by different numerical simulations of cosmic reionization. The overlay is here:

You can find the officially accepted version of the paper on arXiv here.

The third paper of the week is “The effects of projection on measuring the splashback feature” by Xiaoqing Sun (MIT), Stephanie O’Neil (U. Penn.), Xuejian Shen (MIT) and Mark Vogelsberger (MIT), all based in the USA. This paper describes an investigation whether projection effects could lead to any systematic bias in determining the position of the boundary between infalling and accreting matter around haloes. It was published on Wednesday 23rd July in the folder Astrophysics of Galaxies. The overlay is here:

The officially-accepted version can be found on arXiv here.

The fourth paper of the week, also published on Wednesday 22nd July in the folder Astrophysics of Galaxies, is “Host galaxy identification of LOFAR sources in the Euclid Deep Field North” by Laura Bisigello, Marika Giulietti, Isabella Prandoni, Marco Bondi, & Matteo Bonato (INAF, Bologna, Italy), Manuela Magliocchetti (INAF-IAPS Roma, Italy), Huub Rottgering (Leiden Observatory, Netherlands), Leah, K. Morabito (Durham University, UK) and Glenn, J. White (Open Universirty, UK). This presents a catalogue of optical and near-infrared counterparts to radio sources detected in the Euclid Deep Field North using observations from the LOw-Frequency ARray (LOFAR). The overlay is here:

The final, accepted version of the paper is on arXiv here.

Fifth one up is “Constraining the dispersion measure redshift relation with simulation-based inference” by Koustav Konar (Ruhr University Bochum), Robert Reischke (Universität Bonn), Steffen Hagstotz (Ludwig-Maximilians Universität München), Andrina Nicola (Bonn) and Hendrik Hildebrandt (Bochum); all authors based in Germany. This was published on Thursday 24th July in the folder Cosmology and NonGalactic Astrophysics. It discusses using simulations to develop the use of Dispersion Measures of Fast Radio Bursts as cosmological probes. The overlay is here:

You can find the officially accepted version on arXiv here.

The penultimate (sixth) article published this week is “Generating Dark Matter Subhalo Populations Using Normalizing Flows” by Jack Lonergan (University of Southern California), Andrew Benson (Carnegie Observatories) and Daniel Gilman (University of Chicago), all based in the USA. This paper describes a generative AI approach to subhalo populations, trained using the semi-analytical model Galacticus. This paper was published yesterday (i.e. on Friday 25th July) in the folder Astrophysics of Galaxies.

You can find the final version on arXiv here.

The last article published this week is “21 Balmer Jump Street: The Nebular Continuum at High Redshift and Implications for the Bright Galaxy Problem, UV Continuum Slopes, and Early Stellar Populations” by Harley Katz of the University of Chicago, and 13 others based in the USA, UK, Germany, Denmark and Austria. This discusses the implications of extreme nebular emission for the spectroscopic properties of galaxies, especially at high redshift. It was published on Friday 25th July in the folder Astrophysics of Galaxies.

The overlay is here:

You can find the officially-accepted version on arXiv here.

And that’s all the papers for this week. I’ll do another update next Saturday, when we’ll be into August.

#arXiv241007084v2 #arXiv250113170v2 #arXiv250410571v2 #arXiv250415468v2 #arXiv250715963v1 #AstrophysicsOfGalaxies #CircumgalacticMedium #CosmicReionization #Cosmology #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #Euclid #EuclidDeepFieldNorth #fastRadioBursts #galaxyHaloes #generativeAI #LOFAR #NebularEmission #OpenJournalOfAstrophysics #subhaloes #TheOpenJournalOfAstrophysics #UltravioletSpectroscopy

Weekly Update from the Open Journal of Astrophysics – 26/07/2025

It’s Saturday morning again, so it’s time again for an update of papers published at the Open Journal of Astrophysics. Since the last update we have published seven new papers, which brings the number in Volume 8 (2025) up to 105, and the total so far published by OJAp up to 340. I expect we’ll pass the century for this year sometime next week. I had expected a bit of a slowdown in July, but that doesn’t seem to have happened. Anyway, with the century for the year having been achieved, the next target is 120 (the total number we published last year). At the current rate I expect us to reach that sometime in August.

The 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.

The first paper to report is “Non-equilibrium ionization in the multiphase circumgalactic medium – impact on quasar absorption-line analyses” by Suyash Kumar and Hsiao-Wen Chen (University of Chicago, USA). This was published on Tuesday 22nd July 2025 in the folder Astrophysics of Galaxies. It discusses time-dependent photoionization (TDP) models that self-consistently solve for the ionization state of rapidly cooling gas irradiated by the extragalactic ultraviolet background (UVB) and the application thereof to observed systems.

The overlay is here:

The officially-accepted version can be found on arXiv here.

The second paper of the week, also published on Tuesday 22nd July but in the folder Cosmology and Nongalactic Astrophysics, is “Do We Know How to Model Reionization?” by Nick Gnedin (University of Chicago, USA). This paper discusses the similarities and differences between the radiation fields produced by different numerical simulations of cosmic reionization. The overlay is here:

You can find the officially accepted version of the paper on arXiv here.

The third paper of the week is “The effects of projection on measuring the splashback feature” by Xiaoqing Sun (MIT), Stephanie O’Neil (U. Penn.), Xuejian Shen (MIT) and Mark Vogelsberger (MIT), all based in the USA. This paper describes an investigation whether projection effects could lead to any systematic bias in determining the position of the boundary between infalling and accreting matter around haloes. It was published on Wednesday 23rd July in the folder Astrophysics of Galaxies. The overlay is here:

The officially-accepted version can be found on arXiv here.

The fourth paper of the week, also published on Wednesday 22nd July in the folder Astrophysics of Galaxies, is “Host galaxy identification of LOFAR sources in the Euclid Deep Field North” by Laura Bisigello, Marika Giulietti, Isabella Prandoni, Marco Bondi, & Matteo Bonato (INAF, Bologna, Italy), Manuela Magliocchetti (INAF-IAPS Roma, Italy), Huub Rottgering (Leiden Observatory, Netherlands), Leah, K. Morabito (Durham University, UK) and Glenn, J. White (Open Universirty, UK). This presents a catalogue of optical and near-infrared counterparts to radio sources detected in the Euclid Deep Field North using observations from the LOw-Frequency ARray (LOFAR). The overlay is here:

The final, accepted version of the paper is on arXiv here.

Fifth one up is “Constraining the dispersion measure redshift relation with simulation-based inference” by Koustav Konar (Ruhr University Bochum), Robert Reischke (Universität Bonn), Steffen Hagstotz (Ludwig-Maximilians Universität München), Andrina Nicola (Bonn) and Hendrik Hildebrandt (Bochum); all authors based in Germany. This was published on Thursday 24th July in the folder Cosmology and NonGalactic Astrophysics. It discusses using simulations to develop the use of Dispersion Measures of Fast Radio Bursts as cosmological probes. The overlay is here:

You can find the officially accepted version on arXiv here.

The penultimate (sixth) article published this week is “Generating Dark Matter Subhalo Populations Using Normalizing Flows” by Jack Lonergan (University of Southern California), Andrew Benson (Carnegie Observatories) and Daniel Gilman (University of Chicago), all based in the USA. This paper describes a generative AI approach to subhalo populations, trained using the semi-analytical model Galacticus. This paper was published yesterday (i.e. on Friday 25th July) in the folder Astrophysics of Galaxies.

You can find the final version on arXiv here.

The last article published this week is “21 Balmer Jump Street: The Nebular Continuum at High Redshift and Implications for the Bright Galaxy Problem, UV Continuum Slopes, and Early Stellar Populations” by Harley Katz of the University of Chicago, and 13 others based in the USA, UK, Germany, Denmark and Austria. This discusses the implications of extreme nebular emission for the spectroscopic properties of galaxies, especially at high redshift. It was published on Friday 25th July in the folder Astrophysics of Galaxies.

The overlay is here:

You can find the officially-accepted version on arXiv here.

And that’s all the papers for this week. I’ll do another update next Saturday, when we’ll be into August.

#arXiv241007084v2 #arXiv250113170v2 #arXiv250410571v2 #arXiv250415468v2 #arXiv250715963v1 #AstrophysicsOfGalaxies #CircumgalacticMedium #CosmicReionization #Cosmology #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #Euclid #EuclidDeepFieldNorth #fastRadioBursts #galaxyHaloes #generativeAI #LOFAR #NebularEmission #OpenJournalOfAstrophysics #subhaloes #TheOpenJournalOfAstrophysics #UltravioletSpectroscopy

Astronomen vinden mysterieuze radio-pulserende witte dwerg

Een team van astronomen heeft een fascinerende ontdekking gedaan die ons dwingt om ons begrip van het gedrag van dode sterren te herzien. Met behulp van de krachtige Low Frequency Array (LOFAR)-radiotelescoop in Nederland heeft een team een witte dwerg gevonden die iets volkomen

https://www.kuuke.nl/astronomen-vinden-mysterieuze-radio-pulserende-witte-dwerg/

#Exloo #LOFAR #radiogolven #radiopulsen #radiotelescoop #WitteDwer

ASTRON: System mit Weißem Zwerg, helle Radiowellenimpulse mit seltsamen Rhythmus.
Langperiodischer Transient mit 100% polarisierter Radioemission identifiziert, neue Art kosmischer Radioquelle. Theorien, wie tote Sterne starke Emissionen erzeugen, in Frage gestellt. #LOFAR empfing ungewöhnliches Signal. Pressemitteilung: #ASTRON
https://www.raumfahrer.net/astron-astronomen-entdecken-ein-sternsystem-mit-einem-weissen-zwerg-das-helle-radiowellenimpulse-mit-einem-seltsamen-rhythmus-aussendet/

ASTRON: System mit Weißem Zwerg, helle Radiowellenimpulse mit seltsamen Rhythmus.
Langperiodischer Transient mit 100% polarisierter Radioemission identifiziert, neue Art kosmischer Radioquelle. Theorien, wie tote Sterne starke Emissionen erzeugen, in Frage gestellt. #LOFAR empfing ungewöhnliches Signal. Pressemitteilung: #ASTRON
https://www.raumfahrer.net/astron-astronomen-entdecken-ein-sternsystem-mit-einem-weissen-zwerg-das-helle-radiowellenimpulse-mit-einem-seltsamen-rhythmus-aussendet/