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Results tagged with supermassive-black-hole
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user 34155
Questions regarding the most massive examples of black holes that typically reside at the centers of galaxies.
3
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Do all black holes, including stellar-mass ones, rotate at nearly the speed of light? Also, ...
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 par …
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3
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1
answer
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Could the revolution of super-massive black holes around each other create a pulsar-array gr...
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 hole …
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Does the (relative) distance of the photon sphere from the center of a black hole vary accor...
I know that the photon circle or photon sphere is located at around 1.5 times the radius of the Schwarzschild event horizon, but wouldn't it be comparatively further out for smaller black holes?
After …
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2
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2
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Does the density of a black hole decrease after releasing a large amount of Hawking radiation?
Is is true that the smaller a 'regular', stellar-mass black hole is, the denser it is inside of its event horizon? After all, if you look up (or calculate) the Schwarzschild radii of the Sun and the E …
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2
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3
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732
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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 appro …
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6
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1
answer
552
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What do the symbols signify in Dr. Becky Smethurst's radiation pressure equation for black h...
In her most recent video, "An ULTRAMASSIVE black hole has been discovered in a BRAND NEW way!", as well as a previous video, "How massive can black holes get?", Dr. Becky Smethurst shows an equation …
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0
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Is the hypothetical '(Don) Page curve' of evaporating black holes equal in time, so to speak...
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, w …
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12
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4
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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 contem …
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