Quasar HE0450-2958 is a differnt kind of animal. It is the only Quasar without a masive Host Galaxy. Can HE0450-2958 be identifid and assigned a differnt colored dot?
Hi, John. Quite a stunning discovery, isn't it? Nice idea to locate it on the Starsphere Screensaver in a distinguished manner. However, if I'm not mistaken, the stars (and nova remnants) displayed there are only those in our Milky Way, and Quasar HE0450-2958 is ~5 billion light-years distant – good article on it from Space.com: “Black Hole Lurks in Invisible Galaxy”
Hi, John. Quite a stunning discovery, isn't it? Nice idea to locate it on the Starsphere Screensaver in a distinguished manner. However, if I'm not mistaken, the stars (and nova remnants) displayed there are only those in our Milky Way, and Quasar HE0450-2958 is ~5 billion light-years distant – good article on it from Space.com: “Black Hole Lurks in Invisible Galaxy”
I understand from the work here that one model of a BH-BH merger has one black hole consuming the other, with the resulting GWs being analogous to the sound of a bell that has been rung. I was wondering if there is a model where a breach is formed in one of the black holes when its Roche limit is exceeded by an overlapping of Schwarzchild radii from two or more additional supermassive black holes – might this spawn a Quasar? Does a black hole have a Roche limit?
ChipperQ asked: Does a black hole have a Roche limit?
Not in any normal sense. A black hole is not a material object. there is no matter marking the event horison so there nothing there to tear apart. The event horison is just the radius from the centre of mass where the curvature of space is strong enough that even light is gravitationally bound to the black hole.
In situations when the event horisons of two, or more, black holes overlap one will typically expect the black holes to merge and form a larger black hole. This process is extremely complex and something one can still do only very limited calculations about. However numerical computer simulations are getting better and begining to given some estimates for e.g. the amount of energy the two holes will lose in the form of gravitational waves.
Thanks, klasm. I think I understand - would this be similar to the way a drop of condensate (like water on a cold surface) merges with another, to produce a larger drop (where the event horizon is analogous to the surface tension)?
Quasar HE0450-2958
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Hi, John. Quite a stunning discovery, isn't it? Nice idea to locate it on the Starsphere Screensaver in a distinguished manner. However, if I'm not mistaken, the stars (and nova remnants) displayed there are only those in our Milky Way, and Quasar HE0450-2958 is ~5 billion light-years distant – good article on it from Space.com: “Black Hole Lurks in Invisible Galaxy”
RE: Hi, John. Quite a
)
Thank you I'll check out the article
johnwalter
I understand from the work
)
I understand from the work here that one model of a BH-BH merger has one black hole consuming the other, with the resulting GWs being analogous to the sound of a bell that has been rung. I was wondering if there is a model where a breach is formed in one of the black holes when its Roche limit is exceeded by an overlapping of Schwarzchild radii from two or more additional supermassive black holes – might this spawn a Quasar? Does a black hole have a Roche limit?
ChipperQ asked: Does a black
)
ChipperQ asked: Does a black hole have a Roche limit?
Not in any normal sense. A black hole is not a material object. there is no matter marking the event horison so there nothing there to tear apart. The event horison is just the radius from the centre of mass where the curvature of space is strong enough that even light is gravitationally bound to the black hole.
In situations when the event horisons of two, or more, black holes overlap one will typically expect the black holes to merge and form a larger black hole. This process is extremely complex and something one can still do only very limited calculations about. However numerical computer simulations are getting better and begining to given some estimates for e.g. the amount of energy the two holes will lose in the form of gravitational waves.
Thanks, klasm. I think I
)
Thanks, klasm. I think I understand - would this be similar to the way a drop of condensate (like water on a cold surface) merges with another, to produce a larger drop (where the event horizon is analogous to the surface tension)?
The mechanisms are of course
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The mechanisms are of course different, but visually you would see something similar if you could observe the merger.