All Questions
Tagged with supermassive-black-hole quasars
11
questions
2
votes
1
answer
292
views
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 ...
- 123
10
votes
2
answers
2k
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What is the mechanism through which mass is converted to thermal energy in the accretion disc of a black hole?
In the book The Cosmic Perspective, it is stated that as matter is falling into a supermassive black hole, up to $40\%$ of its mass are converted to thermal energy, making the accretion of matter ...
- 203
2
votes
2
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146
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Could quasars be interior to the event horizon of a SMBH?
My question is prompted by suspicion of three current ideas in astrophysics:
GR predicts a singularity at the center of a BH without regard to QM.
quasar hyper-luminosity is caused by an acretion ...
- 29
3
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2
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325
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Why would the merger of spinning black holes within the accretion disk of a supermassive black hole cause them to "shoot straight up" out of the disk?
I just tried to read the new New York Times article Two Black Holes Colliding Not Enough? Make It Three which links to the new 25-June-2020 Physical Review Letter Graham et al. Candidate ...
- 30.7k
2
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1
answer
193
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What enhances the capture and merge rates of pairs of small black holes orbiting around supermassive black holes?
I just tried to read the new New York Times article Two Black Holes Colliding Not Enough? Make It Three which links to the new 25-June-2020 Physical Review Letter Graham et al. Candidate ...
- 30.7k
1
vote
1
answer
137
views
How to convert the observed magnitude of a Quasar to it's bolometric luminosity?
How can I convert the observed magnitude to Bolometric Luminosity? I know the relation for the star but should it be same for a Quasar? Basically I want to convert the X-axis of this plot to ...
- 187
4
votes
1
answer
116
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Is it possible that quasars are not powered by black holes but some other kind of compact, massive object?
AFAIK, objects in the universe thought to be black holes show evidence of radiatively inefficient accretion flow. But is this the case with Quasars? If not, is there a possibility that the core of a ...
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4
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1
answer
186
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Why do Seyfert Galaxies emit less energy than Quasars and Blazars, and how is the emitted energy measured?
When I was reading information about QSOs on a website, it said that Seyfert Galaxies emit less energy than Quasars and QSOs.
Why do Seyfert Galaxies emit less energy than quasars, and how is this ...
- 41
1
vote
1
answer
133
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Accretion discs emitting jets [duplicate]
When there are accretion discs jets of particles or radiations will be emitted in the direction parallel to the rotational axis.
My beginner level astronomy textbook just says that it is due to ...
- 418
3
votes
1
answer
389
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Mass distribution in the early universe
The latest big quasar find at ~12.8 bn LJ with an estimated mass of 12 bn M☉ (see e.g. http://www.newscientist.com/article/mg22530104.000-ancient-black-hole-had-an-inexplicable-growth-spurt.html) puts ...
- 429
8
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1
answer
408
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How often does the supermassive black hole in the Milky Way become a quasar?
My current interest is black holes and quasars. I was wondering how often they erupt--specifically ours? Would it be blindingly bright on Earth? Finally, would there be any effects that would alter ...
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