Questions tagged [accretion-disk]
An accretion disk is the disk around a compact star that accumulates matter from e.g. a companion star by the Roche lobe overflow or stellar wind transfer.
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Rotating black hole
I know that everything that is shaped from gravity force is rotating, and gravity is a central force. but I want to know how can we detect that a black hole has an angular momentum? By which ...
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Neutrinos and black holes
As a new user I could not comment on Do neutrinos of any flavor get trapped in black holes?
My question is that the Ice Cube facility has mapped Neutrinos coming from black holes, as stated in ...
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Improving physics simulation of black hole accretion disk?
I have recently been working on software which uses ray tracing/marching to render a black hole in the Schwarzchild metric. I've implemented most everything that I originally set out to do, and I am ...
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If the BH accretion disk rotates near the speed of light should its EM-radiation in direction of rotation be highly blueshifted?
If the BH accretion disk rotates near the speed of light should its EM-radiation in direction of rotation be highly blueshifted? Maybe gamma blushifted if there weren't gravitational redshift?
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Circular gravitational field
Why do all heavy masses in the universe always have circular gravitational field and why do objects 'falling' under their spacetime influence always fall in circles? For example, accretion disks ...
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Would a black hole act as a particle accelerator between the photon sphere and the event horizon?
I'm trying to understand the behavior of photons between the photon sphere and the event horizon. Here is what I think I understand so far :
the radius of the PS is 1.5 times the Schwarzschild radius
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Is accretion disc caused by frame dragging?
Is accretion disc around a Kerr black hole the result of its frame dragging?
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What happens when a cool brown dwarf slowly accretes matter?
Let's imagine that we take a brown dwarf close to the minimum mass of a red dwarf.
Then let's allow it a few quadrillion years to cool.
Finally slowly accrete matter at a rate of say 1 Jupiter mass ...
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What happens when a helium white dwarf accretes enough matter?
What happens when a helium white dwarf accretes enough matter?
Say you have a white dwarf made of helium, what happens when it's core becomes dense enough to fuse helium and how massive would it have ...
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Is a fusion process possible inside an accretion disk?
Is a fusion process possible inside an accretion disk? As the speed of matter inside an accretion disk approaches the speed of light can an incoming object collide with the disk material and cause a ...
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How can supersonic accretion flows exist in astrophysical scenarios?
I often hear about supersonic accretion flows in astrophysical scenarios: for example, the inner parts of the accretion disk around a supermassive black hole or cold filaments accreting into galaxies ...
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Does some of accretion disk light make focal points above the black hole poles? [duplicate]
Does some of accretion disk light make focal points above the black hole poles?
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Does the latest picture of EHT mean the end to the no hair theorem?
I couldn't help but noticing what looks like "hair" in the latest image from EHT.
Does this mean the end of the no hair theorem?
Pun intended but also a serious question.
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What ranges of $l$ and $m$ give the spherical harmonics for disk features?
The spherical harmonics represent a spherically symmetric basis and correspond to the eigenfunction solutions of the three-dimensional Laplacian. They take the form
$$ Y_l^m(\theta,\phi) = \sqrt{\frac{...
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Are the particles in the accretion disk in free fall around the black hole?
I know that black hole can feed off the material in the accretion disk and gain mass, the accretion disk is also powered by the black hole to move at a fraction of speed of light. I am wondering are ...
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