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#blackholes

6 posts · Last used Aug 11

FediBoard Science @fediboard_science@flipboard.social
· 1mo ago
Finding seven quasars in 800,000 galaxies: the challenge of weighing the universe's hungriest black holes https://www.universetoday.com/articles/seven-needles-800000-haystacks A quasar is a supermassive black hole in the act of feeding, and it’s so bright that it drowns out the galaxy it sits in. That is a nuisance if you want to weigh the galaxy and weighing it is exactly… #science #blackholes #astrophysics
Seven Needles, 800,000 Haystacks
Universe Today

Seven Needles, 800,000 Haystacks

A quasar is a supermassive black hole in the act of feeding, and it’s so bright that it drowns out the galaxy it sits in. That is a nuisance if you want to weigh the galaxy and weighing it is exactly what you need to do to understand how black holes and the host galaxies grew up together. There is a way round it however, catch a quasar whose galaxy happens to be bending the light of something further away, and the bending betrays the mass. The catch is that such alignments are vanishingly rare,

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Euclid Consortium @ec_euclid@mastodon.social
· 3mo ago
#Euclid scientists identified 31 new early Universe quasars, including the two most distant quasars currently known. The new record holder's redshift z=7.77 places it only 670 million years after the Big Bang. https://www.euclid-ec.org/most-distant-quasars/ #ESA #ESAEuclid #astronomy #blackholes #science
Euclid scientists discover most distant known quasars
Euclid Consortium

Euclid scientists discover most distant known quasars

Quasars are growing super-massive black holes, they are the most powerful continuous energy sources in the Universe. Quasars are a key to understanding the formation of structure in the early Universe, and can also be used as very distant background light-sources to study the distribution of gas acr

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Euclid Consortium @ec_euclid@mastodon.social
· 3mo ago
Replying to
With this first collection, #Euclid starts dominating the search for early Universe #quasars. This is no wonder: Euclid's wide survey provides unprecedented sensitivity at wavelengths into the near-infrared, which are key to identifying these rare accreting early black holes. Forecasts predict that in Euclid data even earlier quasars should be found: likely beyond z=8 (650 million years after the Big Bang) and possibly even z=9 (550 million years). #astronomy #ESAEuclid #ESA #blackholes
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Francesca Bo. @astrodisastro@scicomm.xyz
· 6mo ago
RE: https://mastodon.social/@ehtelescope/116365375880098666 Perfino quell'upupa ha una carriera scientifica migliore della mia Even that hoopoe has a better scientific career than me #birb #upupa #uccelli #astrofisica #BuchiNeri #eht #hoopoe #birds #astrophysics #BlackHoles #BirdsOfMastodon
Quoting
Event Horizon Telescope
@ehtelescope@mastodon.social

This feathered visitor recently stopped by the IRAM 30-m telescope to assist with EHT observations.

The bird had gotten lost in the fog and appeared at the control room door- more than 1,500 meters above its usual habitat.

After a brief "internship," it was safely released back into nature the next morning.

Open quoted post
mastodon.social

Event Horizon Telescope: "This feathered visitor recently stopped by the IR…" - Mastodon

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MPI for Gravitational Physics @mpi_grav@academiccloud.social
· 8mo ago
Testing Einstein’s theory of relativity with the clearest gravitational-wave signal yet ℹ️ https://www.aei.mpg.de/1391414/testing-einstein-s-theory-of-relativity-with-the-clearest-gravitational-wave-signal-yet 📄 https://journals.aps.org/prl/abstract/10.1103/6c61-fm1n (Open Access) 1️⃣ Relativity put to the test: A LIGO-Virgo-KAGRA team has conducted some of the most precise tests of Einstein’s theory of general relativity. 2️⃣ Einstein holds fast: In all tests, the observations match the theory’s predictions. In some cases, the tests based on this signal alone are two to three times more stringent than those obtained by combining data from dozens of other signals. 3️⃣ The clearest signal: The team used data from GW250114, the strongest gravitational-wave signal ever detected from the merger of two black holes. 4️⃣ Like a bell: For the first time, detailed analyses of the complete signal and the ringdown phase, which occurs shortly after the merger, have identified or constrained three gravitational-wave tones. Image: H. Pfeiffer, A. Buonanno (@mpi_grav@academiccloud.social), K. Mitman (Cornell University) #Relativity #BlackHoles
Testing Einstein’s theory of relativity with the clearest gravitational-wave signal yet
aei.mpg.de

Testing Einstein’s theory of relativity with the clearest gravitational-wave signal yet

The groundbreaking analysis of GW250114 reveals three gravitational-wave tones, providing stringent tests of general relativity.

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