#gravitationalwaves — Public Fediverse posts

🕳️ 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

🕳️ oddquark // Black Hole Watch — 2026-09-05

A supermassive black hole literally kicked out of its own galaxy by a lopsided merger, now sailing through intergalactic space alone 🚀 Gravity as the ultimate eviction notice. Absolutely unhinged physics.

🔗 https://dailygalaxy.com/2026/09/a-black-hole-was-seen-escaping-its-galaxy/

#BlackHole #Astrophysics #GravitationalWaves #EventHorizon

🕳️ oddquark // Black Hole Watch — 2026-09-05

A supermassive black hole literally kicked out of its own galaxy by a lopsided merger, now sailing through intergalactic space alone 🚀 Gravity as the ultimate eviction notice. Absolutely unhinged physics.

🔗 https://dailygalaxy.com/2026/09/a-black-hole-was-seen-escaping-its-galaxy/

#BlackHole #Astrophysics #GravitationalWaves #EventHorizon

How it all began almost exactly 31 years ago:

Karsten Danzmann breaks the ground for the German-British gravitational-wave detector GEO600 on 4 September 1995. He did not have to dig the two 600 meter long arm trenches all by himself, though 😉

Until the end of 1995 the foundations for the central building were done and the arm trenches were prepared.

➡️ https://www.geo600.org/66095/1995

#GEO600Highlights #GEO600 ^#Research #ScienceHistory #GravitationalWaves

How it all began almost exactly 31 years ago:

Karsten Danzmann breaks the ground for the German-British gravitational-wave detector GEO600 on 4 September 1995. He did not have to dig the two 600 meter long arm trenches all by himself, though 😉

Until the end of 1995 the foundations for the central building were done and the arm trenches were prepared.

➡️ https://www.geo600.org/66095/1995

#GEO600Highlights #GEO600 ^#Research #ScienceHistory #GravitationalWaves

How it all began almost exactly 31 years ago:

Karsten Danzmann breaks the ground for the German-British gravitational-wave detector GEO600 on 4 September 1995. He did not have to dig the two 600 meter long arm trenches all by himself, though 😉

Until the end of 1995 the foundations for the central building were done and the arm trenches were prepared.

➡️ https://www.geo600.org/66095/1995

#GEO600Highlights #GEO600 ^#Research #ScienceHistory #GravitationalWaves

How it all began almost exactly 31 years ago:

Karsten Danzmann breaks the ground for the German-British gravitational-wave detector GEO600 on 4 September 1995. He did not have to dig the two 600 meter long arm trenches all by himself, though 😉

Until the end of 1995 the foundations for the central building were done and the arm trenches were prepared.

➡️ https://www.geo600.org/66095/1995

#GEO600Highlights #GEO600 ^#Research #ScienceHistory #GravitationalWaves

How it all began almost exactly 31 years ago:

Karsten Danzmann breaks the ground for the German-British gravitational-wave detector GEO600 on 4 September 1995. He did not have to dig the two 600 meter long arm trenches all by himself, though 😉

Until the end of 1995 the foundations for the central building were done and the arm trenches were prepared.

➡️ https://www.geo600.org/66095/1995

#GEO600Highlights #GEO600 ^#Research #ScienceHistory #GravitationalWaves

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.

The GEO600 project will end on 31 December 2026

The gravitational-wave detector GEO600 south of Hanover, Germany, will cease operation at the end of 2026. The last Open Day will take place this summer. Group tours will be offered until the end of the year. In early 2027, dismantling of the facility will begin.

@maxplanckgesellschaft director Karsten Danzmann will retire on 31 March 2026. As a consequence, funding for the GEO600 project will terminate at the end of the year.

GEO600 is a beacon of international research. Technologies developed and tested in the GEO project are now used in all major gravitational-wave detectors around the world. The findings and experience gained also play a role in preparing future observatories such as the Einstein Telescope and the Cosmic Explorer.

ℹ️ https://www.geo600.org/240777/das-geo600-projekt-endet-am-31-dezember-2026

#GravitationalWaves #Physics #Astrophysics #Research #GEO600

Almost exactly 30 years ago – on Monday, 4 September 1995 – on a meadow on the grounds of the [email protected] near Ruthe, south of Hanover, Germany: Karsten Danzmann breaks the ground for the German-British gravitational-wave detector GEO600.

GEO600 is a key technology development center of the international gravitational-wave research community. Technologies developed and tested in the GEO project are now used in all large gravitational-wave detectors in the world.

You can read the complete story of GEO600 from the groundbreaking ceremony to the present day in the GEO600 diary.

➡️ https://www.geo600.org/25089/geo600-diary

Today, GEO600 researchers will take their detector to the next level. Their goal is to search for gravitational waves at frequencies much higher than those observed by current instruments and to deepen our understanding of dark matter and the early Universe.

#GEO600 #GravitationalWaves #Hannover #Research #Science

Continuous #improvement. #Scientific study. Fuels our advancements. #blackhole #science #hawking #gravitationalwaves

https://www.npr.org/2025/09/11/nx-s1-5537131/ligo-10-years-black-holes-hawking-theory-confirmed

Leveling up GEO600 🚀🎚️

The gravitational-wave detector GEO600 is being upgraded to enable observations at very high frequencies.

ℹ️ https://www.geo600.org/219762/levelling-up-geo600

The detection of high-frequency gravitational waves could shed light on dark matter, exotic physics, and the early Universe.

The upgrades at the cutting edge of science will maintain GEO600's status as a pioneer in gravitational-wave research.

#GEO600 #GEO600VHF #GravitationalWaves #DarkMatter #astrophysics #physics #research

Understanding mysterious magnetars 🧲 and radio bursts 🌟 with gravitational waves

A flash of radio waves lasting a few thousandths of a second, as bright as millions or billions of stars, and it’s all over: even almost 20 years after their discovery, fast radio bursts remain one of the most mysterious phenomena in our Universe. Scientists believe that neutron stars – very small and extremely dense stellar remnants with huge magnetic fields – emit these bursts.

An international team has now used gravitational waves to study a nearby neutron star that has emitted several radio bursts. The researchers analyzed data from the German-British GEO600 detector to learn more about the origin of these events. Their results contribute to a better understanding of these extreme events and their theoretical description.

ℹ️ https://www.geo600.org/219378/understanding-mysterious-magnetars-and-radio-bursts-with-gravitational-waves

📄 https://iopscience.iop.org/article/10.3847/1538-4357/ad8de0 [Open Access]

#Magnetar #FRB #FastRadioBurst #GravitationalWaves #GEO600 #NeutronStar #SGR1935+2154

Understanding mysterious magnetars 🧲 and radio bursts 🌟 with gravitational waves

A flash of radio waves lasting a few thousandths of a second, as bright as millions or billions of stars, and it’s all over: even almost 20 years after their discovery, fast radio bursts remain one of the most mysterious phenomena in our Universe. Scientists believe that neutron stars – very small and extremely dense stellar remnants with huge magnetic fields – emit these bursts.

An international team has now used gravitational waves to study a nearby neutron star that has emitted several radio bursts. The researchers analyzed data from the German-British GEO600 detector to learn more about the origin of these events. Their results contribute to a better understanding of these extreme events and their theoretical description.

ℹ️ https://www.geo600.org/219378/understanding-mysterious-magnetars-and-radio-bursts-with-gravitational-waves

📄 https://iopscience.iop.org/article/10.3847/1538-4357/ad8de0 [Open Access]

#Magnetar #FRB #FastRadioBurst #GravitationalWaves #GEO600 #NeutronStar #SGR1935+2154

“How gravitational waves could help detect Star Trek-style warp drive spaceships” 🚀✴️

Katy Clough, Sebastian Khan, and Tim Dietrich (@maxplanckgesellschaft Fellow at @mpi_grav) for “The Conversation” on their latest joint paper on the gravitational-wave signatures of collapsing warp drives.

Engage!

https://theconversation.com/how-gravitational-waves-could-help-detect-star-trek-style-warp-drive-spaceships-237261

#StarTrek #Warp #WarpDrive #GravitationalWaves

Detecting Faster Than Light Travel by Extraterrestrials https://hackaday.com/2024/08/04/detecting-faster-than-light-travel-by-extraterrestrials/ #gravitationalwaves #fasterthanlight #warpdrive #Space

Detecting Faster Than Light Travel by Extraterrestrials - The idea of traveling faster than the speed of light (FTL) has been a popular idea... - https://hackaday.com/2024/08/04/detecting-faster-than-light-travel-by-extraterrestrials/ #gravitationalwaves #fasterthanlight #warpdrive #space

How To See #BlackHoles By Catching #Neutrinos

https://www.youtube.com/watch?v=CtmBZ-S2R30&ab_channel=PBSSpaceTime

#Science Physics #BlackHole #Neutrino #Astronomy #Astrophysics #Gravity #GravitationalWaves #NeutrinoAstronomy #NeutrinoAstrophysics #CherenkovRadiation #IceCube #PBS #SpaceTime #PBSSpaceTime #MattOdowd