Questions tagged [supermassive-black-hole]
Questions regarding the most massive examples of black holes that typically reside at the centers of galaxies.
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What is the best catalog of black hole candidates?
I posted this questions in Physics stack:
"I am searching for a catalog, list, database, etc. That should show astronomical observations of known black hole candidates. I am primarily interested ...
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Is the hypothetical '(Don) Page curve' of evaporating black holes equal in time, so to speak, on both sides of the curve?
I have heard that Hawking radiation is slow at first, but rapidly increases when the black hole becomes much smaller... (I forget the formula...)
Does that mean that the second half of Page's curve, ...
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What came first, the super-massive black holes, or the galaxies surrounding them?
The fact is, many, if not most large galaxies have a supermassive black hole at their center. My question is why? Is it because when these galaxies were first formed supermassive black holes were ...
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Do all black holes, including stellar-mass ones, rotate at nearly the speed of light? Also, what exactly does that do to their shape?
From what I understand, astrophysicists have known for almost a decade that supermassive black holes seem to spin at incredible velocities; nearly the speed of light... In fact, some of the outer ...
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How do two supermassive black holes reach "the last parsec" in the case of merging galaxies?
This answer to Why can't supermassive black holes merge? (or can they?) describes the barrier to merging that two supermassive black holes face when two galaxies are in the process of merging or have "...
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How can a black hole have a charge, or be charged?
So-called 'hairless' black holes (no-hair theory, or theorem?) , which is what real black holes are, can be described by just three characteristics: Mass, spin, and charge.
It is easy enough to ...
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How bright in the night sky would J0529-4351 (brightest quasar ever found) be if it were in our galaxy?
According to this article, the quasar (black hole) named J0529-4351 is the most luminous object in the known universe, being:
500 trillion times more luminous than the Sun
To put it in terms easier ...
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Could macroscopic primordial black holes have created metals shortly after the big bang?
After seeing articles about the JWST like these two: https://news.cornell.edu/stories/2023/02/astronomers-discover-metal-rich-galaxies-early-universe
https://www.livescience.com/james-webb-space-...
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How can Kerr black holes have a 'speed limit' to how fast they can spin?
Obviously, the speed of light is a presumed limit, at least for 'physical' objects moving 'within' ('through'?) spacetime, but...
In recent news some scientists believe they have figured out the ...
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How did the Milky Way quasar not disrupt life on Earth?
According to most sources of information I have found (A Quora answer and books), when galaxies become quasars, they destroy all life in their host galaxy, as they output so much radiation that they ...
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If two black hole event horizons overlap (touch) can they ever separate again?
Hypothetical question based on my understanding that two event horizons that overlap (touch) can't ever separate again:
Imagine a 1 billion solar mass black hole (so the event horizon is massive and ...
CommunityBot
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What is a "Gentle Giant" Black Hole?
I have seen articles about the Milky Way's "gentle giant" black hole. For example:
https://nypost.com/2022/05/12/image-of-gentle-giant-black-hole-at-milky-ways-center/
https://www.reuters....
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ER=EPR and information fuelling cosmic expansion
I apologize in advance for the lack of education, I'm a Canadian hillbilly.
I was considering the concepts of ER=EPR and the growth of the black hole's internal system with the addition of information ...
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Is it possible to detect gravitational lensing of both light and gravitational waves originating from the same event?
Is it theoretically possible to detect gravitational lensing of both light and gravitational waves, when both originate from the same source/event (merger of two stellar black holes or merger of two ...
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Could the revolution of super-massive black holes around each other create a pulsar-array gravitational wave signal despite 'final parsec' problem?
Some commentators on the recently-observed very-long-wavelength gravitational wave signal involving pulsars, like Dr. Becky Smethurst, have implied that it might not be merging supermassive black ...
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