#gravitationalwaves — Public Fediverse posts

Öffentlicher Vortrag:

-- „Pulsare und Gravitationswellen“ --

von Kathrin Grunthal, M.Sc., MPIfR Bonn.
📆 17. September
⏰️ 19:00 Uhr
📍 Argelander-Institut für Astronomie
Auf dem Hügel 71
Bonn, NRW 53121

👉 https://www.volkssternwarte-bonn.de/wordpress/kalender/bonner-sternenhimmel-pulsare-und-gravitationswellen/

❗ Eine Anmeldung zur Veranstaltung ist nicht erforderlich.

☀️ Sofern gutes Wetter herrscht, kann im Anschluss an den Vortrag eine Beobachtung an einem Teleskop angeboten werden.

#vortrag #opentalk #äffentlichervortrag #scienceforeveryone #MPIfR #pulsar #gravitationalwaves #Einstein

Öffentlicher Vortrag:

-- „Pulsare und Gravitationswellen“ --

von Kathrin Grunthal, M.Sc., MPIfR Bonn.
📆 17. September
⏰️ 19:00 Uhr
📍 Argelander-Institut für Astronomie
Auf dem Hügel 71
Bonn, NRW 53121

👉 https://www.volkssternwarte-bonn.de/wordpress/kalender/bonner-sternenhimmel-pulsare-und-gravitationswellen/

❗ Eine Anmeldung zur Veranstaltung ist nicht erforderlich.

☀️ Sofern gutes Wetter herrscht, kann im Anschluss an den Vortrag eine Beobachtung an einem Teleskop angeboten werden.

#vortrag #opentalk #äffentlichervortrag #scienceforeveryone #MPIfR #pulsar #gravitationalwaves #Einstein

Öffentlicher Vortrag:

-- „Pulsare und Gravitationswellen“ --

von Kathrin Grunthal, M.Sc., MPIfR Bonn.
📆 17. September
⏰️ 19:00 Uhr
📍 Argelander-Institut für Astronomie
Auf dem Hügel 71
Bonn, NRW 53121

👉 https://www.volkssternwarte-bonn.de/wordpress/kalender/bonner-sternenhimmel-pulsare-und-gravitationswellen/

❗ Eine Anmeldung zur Veranstaltung ist nicht erforderlich.

☀️ Sofern gutes Wetter herrscht, kann im Anschluss an den Vortrag eine Beobachtung an einem Teleskop angeboten werden.

#vortrag #opentalk #äffentlichervortrag #scienceforeveryone #MPIfR #pulsar #gravitationalwaves #Einstein

Öffentlicher Vortrag:

-- „Pulsare und Gravitationswellen“ --

von Kathrin Grunthal, M.Sc., MPIfR Bonn.
📆 17. September
⏰️ 19:00 Uhr
📍 Argelander-Institut für Astronomie
Auf dem Hügel 71
Bonn, NRW 53121

👉 https://www.volkssternwarte-bonn.de/wordpress/kalender/bonner-sternenhimmel-pulsare-und-gravitationswellen/

❗ Eine Anmeldung zur Veranstaltung ist nicht erforderlich.

☀️ Sofern gutes Wetter herrscht, kann im Anschluss an den Vortrag eine Beobachtung an einem Teleskop angeboten werden.

#vortrag #opentalk #äffentlichervortrag #scienceforeveryone #MPIfR #pulsar #gravitationalwaves #Einstein

Öffentlicher Vortrag:

-- „Pulsare und Gravitationswellen“ --

von Kathrin Grunthal, M.Sc., MPIfR Bonn.
📆 17. September
⏰️ 19:00 Uhr
📍 Argelander-Institut für Astronomie
Auf dem Hügel 71
Bonn, NRW 53121

👉 https://www.volkssternwarte-bonn.de/wordpress/kalender/bonner-sternenhimmel-pulsare-und-gravitationswellen/

❗ Eine Anmeldung zur Veranstaltung ist nicht erforderlich.

☀️ Sofern gutes Wetter herrscht, kann im Anschluss an den Vortrag eine Beobachtung an einem Teleskop angeboten werden.

#vortrag #opentalk #äffentlichervortrag #scienceforeveryone #MPIfR #pulsar #gravitationalwaves #Einstein

🕳️ oddquark // Black Hole Watch — 2026-09-08

Ringdown chirps after mergers could be whispering secrets past the no-hair theorem 🤯 imagine using gravitational wave overtones to catch a black hole's hidden "fuzz" and rewrite Einstein's rulebook on horizons!

🔗 https://phys.org/news/2026-09-black-holes-hidden-hair-scientists.html

#BlackHole #Astrophysics #GravitationalWaves #EventHorizon

🕳️ oddquark // Black Hole Watch — 2026-09-08

Ringdown chirps after mergers could be whispering secrets past the no-hair theorem 🤯 imagine using gravitational wave overtones to catch a black hole's hidden "fuzz" and rewrite Einstein's rulebook on horizons!

🔗 https://phys.org/news/2026-09-black-holes-hidden-hair-scientists.html

#BlackHole #Astrophysics #GravitationalWaves #EventHorizon

🕳️ oddquark // Black Hole Watch — 2026-09-07

A STAR POWERED BY A BLACK HOLE?! JWST may have caught the missing link for those 'little red dots' — a gas-shrouded black hole eating so violently it mimics stellar light. Early universe physics is unhinged 🤯🕳️

🔗 https://www.forbes.com/sites/jamiecartereurope/2026/09/05/webb-telescope-find-a-new-kind-of-object---a-black-hole-star/

#BlackHole #Astrophysics #GravitationalWaves #EventHorizon

🕳️ oddquark // Black Hole Watch — 2026-09-07

A STAR POWERED BY A BLACK HOLE?! JWST may have caught the missing link for those 'little red dots' — a gas-shrouded black hole eating so violently it mimics stellar light. Early universe physics is unhinged 🤯🕳️

🔗 https://www.forbes.com/sites/jamiecartereurope/2026/09/05/webb-telescope-find-a-new-kind-of-object---a-black-hole-star/

#BlackHole #Astrophysics #GravitationalWaves #EventHorizon

🕳️ oddquark // Black Hole Watch — 2026-09-06

Light from BEHIND a black hole, bent around it and delayed on arrival — we're literally watching photons trace spacetime curvature predicted by GR. The accretion disk's hidden far side, revealed by pure gravity. Absolutely unhinged 🤯🌌

🔗 https://www.thebrighterside.news/post/astronomers-confirm-einsteins-gravity-by-viewing-light-from-behind-a-supermassive-black-hole/

#BlackHole #Astrophysics #GravitationalWaves #EventHorizon

🕳️ oddquark // Black Hole Watch — 2026-09-06

Light from BEHIND a black hole, bent around it and delayed on arrival — we're literally watching photons trace spacetime curvature predicted by GR. The accretion disk's hidden far side, revealed by pure gravity. Absolutely unhinged 🤯🌌

🔗 https://www.thebrighterside.news/post/astronomers-confirm-einsteins-gravity-by-viewing-light-from-behind-a-supermassive-black-hole/

#BlackHole #Astrophysics #GravitationalWaves #EventHorizon

JWST finds mysterious red objects pairing up in the early universe

JWST images have revealed four candidate pairs of “little red dots,” comp…
#NewsBeep #News #Science #activegalacticnuclei #Astronomy #AU #Australia #blackholemergers #BlackHoles #Cosmology #cosmos-web #EarlyUniverse #GalaxyMergers #Gravitationalwaves #infraredastronomy #Jameswebbspacetelescope #JWST #KavliIPMU #lisa #littlereddots #research #SpaceNews #supermassiveblackholes #UniversityofTokyo
https://www.newsbeep.com/au/878688/

JWST finds mysterious red objects pairing up in the early universe

JWST images have revealed four candidate pairs of “little red dots,” comp…
#NewsBeep #News #Science #activegalacticnuclei #Astronomy #AU #Australia #blackholemergers #BlackHoles #Cosmology #cosmos-web #EarlyUniverse #GalaxyMergers #Gravitationalwaves #infraredastronomy #Jameswebbspacetelescope #JWST #KavliIPMU #lisa #littlereddots #research #SpaceNews #supermassiveblackholes #UniversityofTokyo
https://www.newsbeep.com/au/878688/

📣 New title image 🖼️

The image shows results from computer simulations of neutron star mergers at five different times (from less then 2 to about 120 milliseconds) after the merger. Researchers from the “Computational Relativistic Astrophysics” department at the @mpi_grav in Potsdam conducted these simulations to investigate the dynamics and convective stability of massive neutron stars that form in the violent events.

In the image, the top panel shows the evolution of the rest-mass density, and the bottom panel that of the thermal contribution to the specific internal energy. The image is from Fig. 1 in the publication “Convective stability analysis of massive neutron stars formed in binary mergers”.

➡️ https://journals.aps.org/prd/abstract/10.1103/w8gq-3d54 [Open Access publication]

#NeutronStar #Astrophysics #GravitationalWaves #Astronomy #Astrodon

Weekly Update from the Open Journal of Astrophysics – 06/06/2026

Another Saturday, another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further five papers, bringing the number in Volume 9 (2026) to 119 and the total so far published by OJAp up to 567.

I will continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.

The first paper to report this week, published on Tuesday 2nd June, is “The impact of the formation channel on gravitational-wave-galaxy cross-correlations” by Kabir Chakravarti (Chennai Mathematical Institute, India) and Federico R Urban (CEICO-FZU, Czech Republic). This article, published in the folder Cosmology and Nongalactic Astrophysics, explores how uncertainties in binary formation affect the cross-correlation signal between gravitational wave events and galaxy catalogues, finding that time-delay distribution significantly impacts the signal.

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/116679308847047911

The second paper for this week, also published on Tuesday 2nd June but in the folder High-Energy Astrophysical Phenomena, is “Transient X-ray Sources as Extremely Eccentric Mass-Transfer Binaries with Compact Companions” by Jonathan I Katz and Michael A Nowak (Washington University, St Louis, USA). This article suggests that X-ray transients, similar to tidal disruption events, are produced in eccentric stellar-compact object binaries, with their frequency gradually increasing over time.

The overlay for this one looks like this:

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

https://fediscience.org/@OJ_Astro/116679395198117735

Next one up, the third paper of the week, also published on Tuesday 2nd June in the folder High-Energy Astrophysical Phenomena is “Resolving the (Debate About) Nozzle Shocks in Tidal Disruption Events” by Zachary L. Andalman & Eliot Quataert (Princeton U., USA), Eric R. Coughlin (Syracuse U. USA) and C. J. Nixon (U. Leeds, UK). This paper presents a model to understand the role of nozzle shocks in the circularization of stellar debris during a tidal disruption event when a star approaches a supermassive black hole (SMBH)

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/116679426224933831

The fourth paper this week, published on Wednesday 3rd June in the folder Cosmology and Nongalactic Astrophysics, is “Validating Digital Twins of the Local Universe with the Thermal Sunyaev-Zel’dovich Signal” by Richard Stiskalek (University of Oxford, UK) and Harry Desmond (University of Portsmouth, UK). The thermal Sunyaev-Zel’dovich effect and constrained simulations are used to analyze the thermal pressure of ionized gas in galaxy clusters and produce a set of digital twins for cosmological study.

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/116684470440285496

The fifth and final paper this week, published on Thursday 4th June in the folder Cosmology and Nongalactic Astrophysics is “Photon (Non)Conservation in the Reduced Speed of Light Approximation and How to (Almost) Fix It” by Nickolay Y. Gnedin (University of Chicago, USA). The “Reduced Speed of Light” approximation in cosmological simulations can lead to photon non-conservation, and while some missing photons can be counted, adding them back is challenging.

The overlay for this one is here:

The officially accepted version of this paper can be found on arXiv here and Mastodon announcement here

https://fediscience.org/@OJ_Astro/116691566968428861

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

New catalog more than doubles the number of gravitational-wave detections made by LIGO, Virgo, and KAGRA observatories

The latest crop of space-time wobbles includes a variety of heavy, fast-spinning, and lopsided colliding black holes.

https://www.ligo.caltech.edu/news/ligo20260305

#LIGO #Virgo #KAGRA #GravitationalWaves #gravitation #physics #space #science #news #astrodon #astrophysics #blackholes

Fascinating LUTh seminar! Debarati Chatterjee shows how gravitational waves let us peer inside neutron stars to study ultra-dense matter — connecting nuclear theory, heavy-ion experiments and astrophysics. A must-watch for anyone curious about extreme physics! #GravitationalWaves #NeutronStars #DenseMatter #Astrophysics #NuclearPhysics #MultiMessenger #Science #English
https://astrotube.obspm.fr/videos/watch/88ae041e-40f5-42f5-9a5d-a7265bb0baa4

Today, the European Space Agency (ESA) and OHB System AG sealed their agreement to build ESA’s Laser Interferometer Space Antenna, @LISA

ℹ️ https://www.lisamission.org/industry/

“We are delighted that the European Space Agency has now chosen the industrial partner who will take on the manufacturing of LISA, marking another major step towards launch”, says Dr. Jonathan Gair, chair of the LISA Consortium council and group leader at @mpi_grav in Potsdam.

#GravitationalWaves #SpaceIndustry #LISAMission

👇 Exciting news for the @LISA gravitational-wave space observatory! 🚀

The @mpi_grav and OHB Systems AG have signed a contract for the further development and production of the LISA phasemeter. It’s the key instrument for LISA’s gravitational-wave observations.

➡️ https://www.aei.mpg.de/1254455/entscheidender-fortschritt-fuer-lisa-das-gravitationswellen-observatorium-im-weltall

The ESA mission, scheduled for launch in 2035, will provide unprecedented insights into the Universe!

Picture: OHB

#LISAMission #GravitationalWaves

🎉 Happy belated birthday, GW230529!

Two years and a few days ago, the @LIGO Livingston gravitational-wave detector observed a remarkable gravitational-wave signal.

ℹ️ https://www.aei.mpg.de/1138125/mysterious-object-in-the-gap

Detected soon after the beginning of the fourth joint observing run of the LIGO-Virgo-KAGRA collaborations, the signal came from the merger of a compact object with 1.3 to 2.1 times the mass of our Sun with another compact object with 2.6 to 4.7 times the solar mass.

Astronomers believe that the lighter object is a neutron star and the heavier is a lightweight black hole.

How that lightweight black hole formed is unknown. Its masse falls into the “lower mass gap” between the heaviest neutron stars and the lightest black holes.

📄 https://iopscience.iop.org/article/10.3847/2041-8213/ad5beb

Image: I. Markin (@unipotsdam), T. Dietrich (@unipotsdam and @mpi_grav) H. Pfeiffer, A. Buonanno (@mpi_grav)

#GW230529 #GravitationalWaves #MassGap #BlackHole #NeutronStar #Astronomy

💡 Breakthrough in simulating how neutron stars collide 💥

Longest self-consistent numerical-relativity simulation to date reveals details of black hole and jet formation and advances multi-messenger astronomy.

ℹ️ https://www.aei.mpg.de/1249127/breakthrough-in-simulating-how-neutron-stars-collide

📄 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.134.211407

Picture: K. Hayashi / @mpi_grav

#NeutronStar #Astrophysics #BlackHole #MultiMessengerAstronomy #Kilonova #Jet #Astronomy #GravitationalWaves

The new @LIGO Magazine is out and available online!

➡️ https://ligo.org/wp-content/uploads/2025/03/LIGO-magazine-issue26.pdf [pdf]

This time…

… with an article by Elise Sänger, PhD student at @mpi_grav in Potsdam, on the formation of the LIGO-Virgo-KAGRA Climate & Sustainability Committee (page 16)

… @harte_echtzeit, a scientist during the day and a musician during nights, on his gravitational-wave inspired music which he also presented during our 2024 Open Day at GEO600 (page 20)

… an update from @LISA on the full-scale telescope prototype revealed by NASA (page 24)

… and a lot more great reading from the science community.

#LIGOMagazine #GravitationalWaves #LISAMission

If you want to learn more about our volunteer distributed computing project @einsteinathome, you can read up on our online portal “Einstein Online”:

ℹ️ https://www.einstein-online.info/en/spotlight/eah/

#CitizenScience #GravitationalWaves #pulsars #NeutronStars #astronomy #astrophysics #EinsteinAtHome

New @DAAD_worldwide “science in a nutshell” video about @LISA!

Got four minutes to spare? Why not use them to listen to Marie-Sophie Hartig explain how @LISA will observe the gravitational-wave Universe?

➡️ https://inv.nadeko.net/watch?v=ObK0-COD9Zk [Invidious]

➡️ https://www.youtube.com/watch?v=ObK0-COD9Zk [YouTube]

#GravitationalWaves #LISAMission #astronomy #BlackHoles #Outreach #SciComm #Science #Physics #Astrophysics

New header picture:

This month the volunteer distributed computing project @einsteinathome turns 20 years old.

The Einstein@Home volunteers have already discovered more than 90 new neutron stars, and we hope to discover many more in the future. Our long-term goal is the first direct detection of continuous gravitational waves.

More about Einstein@Home on our homepage: https://www.aei.mpg.de/43575/einstein-home

Project homepage: https://einsteinathome.org/

#CitizenScience #SciComm #GravitationalWaves #Pulsars #Astronomy #Physics #EinsteinAtHome