「 It seems as if the information entering a black hole is tied more to its surface than to its volume. Its two-dimensional surface. Whatever information we pour onto the event horizon seems to stay there, responding directly to that information. It seems as if we are encoding all the three-dimensional information about what constructed and what fell into black holes on their two-dimensional surfaces 」 https://www.universetoday.com/164872/the-holographic-secret-of-black-holes/
"Although Roger Penrose won the Nobel Prize in physics just a few years ago for demonstrating how black holes come to exist in our Universe, singularities and all, the subject isn't closed. We've never peered beneath the event horizon, and have no way of detecting what's inside. Using a powerful mathematical argument, [Roy] Kerr argues that singularities shouldn't physically exist. He may be right."
📢 Jürgen Ehlers Spring School on Gravitational Physics
ℹ️ Crash course on Gravitational Physics, General Relativity, Black Holes, and Gravitational-wave Astrophysics at @mpi_grav Potsdam
📅 Feb 26 – Mar 8, 2024
➡️ https://springschool.aei.mpg.de
NGC 7727, the billion-year-old aftermath of a double spiral #galaxy collision. At the heart of this chaotic interaction, entwined and caught in the midst of the #chaos, is a pair of supermassive #blackholes — the closest such pair ever recorded from #Earth.
Wow, some seriously beautiful 3D rendering of the complex simulations of the Sgr* black hole in this new modelling paper by the EHT Collaboration today on #astroph
"The Ring"
Supermassive black holes are elusive creatures. We mostly study them indirectly through their bright accretion disks or powerful jets of plasma they create. But what still eludes us is capturing a direct image of the enigmatic photon ring.
A new work in Acta Astronautica proposes how this might be done.
Read more at: https://briankoberlein.com/blog/ring/
New results from the #EventHorizonTelescope: Detection of event horizon scale circular polarization (CP) in the supermassive black hole in M87.
We can tell it is there, but we have a hard time imaging it. So, this is a first step only. Modeling suggests that this CP comes from Faraday conversion, which is not unexpected. The models support the paradigm that magnetic fields are dynamically important (and lead to the formation of jets).
ALMA captured, for the first time, the accretion flow towards a supermassive black hole. Identifying this flow had long been a challenge, due to the small scale of these regions and the complex gas motion near galactic centers. They saw where the foreground molecular gas absorbed the bright light coming from the Active Galaxy Nucleus, and evidence of its movement.
A team of #astrophysicists has proposed that certain pairings of #blackholes held apart by cosmic expansion could be mistaken for a single equal-#mass black hole.
1/16 This July, I gave an invited talk in the "Communicating Science Through Art" session at the European Astronomical Society annual meeting, organized by the amazing @theastrophoenix . And I thought it may be something that would also interest you #fediverse folks.
The aim of the talk was partly to give people insight into my why & how of my art. But mainly to encourage others to just try. In a very subjective manner.
9/16 I do use my #SciArt for a lot of different things.
Outreach - the example is for an article I wrote about #BlackHoles for physics high school teachers (thanks @mpoessel for inviting me to write it). Using my own drawings is allowing me to express exactly what I want - here the focus was on the scales of the system which is not something you can easily read from artist's impression and where just having numbers written down is also not enough. The combo of sketch and numbers makes it work!
#Harvard 📆 October 11, 2022 : Some spaghettified material occasionally gets flung out back into #space 🌌. #Astronomers liken it to #BlackHoles ⚫ being messy eaters — not everything they try to consume makes it into their mouths.
But the emission, known as an outflow, normally develops quickly after a #TDE occurs — not years later.
First evidence of spinning black hole detected by scientists (www.theguardian.com)
Region at centre of Messier 87 galaxy captured by the Event Horizon Telescope in motion
Heart of the 'Squid Galaxy' reveals how supermassive black holes dictate galactic chemistry (www.space.com)
Scientists studied the Squid Galaxy, Messier 77, to determine how chemicals swirl around its shrouded central black hole.