All Questions
Tagged with quasars accretion-discs
7
questions
7
votes
1
answer
72
views
What "external illumination" source causes the heating of a quasar's accretion disc?
In Section 3.4, UV-to-optical continuum flux ratio, Gaskell et al. (2023) Estimating reddening of the continuum and broad-line region of active galactic nuclei: the mean reddening of NGC 5548 and the ...
- 2,600
2
votes
1
answer
144
views
How do accretion disks around black holes evaporate via winds?
I'm curious as to how accretion disks around black holes evaporate. I've heard winds play a crucial role in this. But what winds specifically and how do they form? Is it a stellar wind of sorts? If so ...
- 41
3
votes
2
answers
326
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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
votes
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
0
answers
55
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Causes of emission of accretion disk
As far as I can see, there are two main sources for the emission of energy from an accretion disk:
release of gravitational potential energy of the infalling matter;
friction from differential ...
- 2,600
14
votes
2
answers
1k
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Quasar mass and accretion rates
This page on Wikipedia -- Quasars mentions that the "The largest known [quasar] is estimated to consume matter equivalent to 600 Earths per minute". However, there is no citation for this comment. How ...
- 2,600
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