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Did the black hole impart any energy to the leaving star? It sounds more like there were two stars each under the other's influence and the black hole removed o
by biddlesby 7y ago
Did the black hole impart any energy to the leaving star? It sounds more like there were two stars each under the other's influence and the black hole removed one star, freeing the other to go off on an adventure
- raducu 7y agoThe author said on /r/space that was the case -- this was a binary system with the stars orbiting very close to eachother.
- ars 7y agoHe was asking if the velocity was given by the black hole, or if it was already there from the binary star orbit. I can't figure out any way a black hole can give velocity (relative to the black hole) - any increase in velocity would be balanced by a decrease as the object leaves.
- phaedrus 7y agoNot velocity - momentum is what is conserved. So the black hole could have absorbed the equal and opposite momentum, but being more massive, not gained much velocity. Or, a hypothetical scenario in separating the two it could have flung them in opposite directions, in which case it would be net zero momentum. (But I don't know if - and kind of doubt whether - that is a possible outcome of a three-body interaction.)
- glaberficken 7y agorelevant: Factual explanation of the 3 body problem: https://en.wikipedia.org/wiki/Three-body_problem https://en.wikipedia.org/wiki/Three-body_problem And the 1st book of an (excellent) si-fi triology: https://en.wikipedia.org/wiki/The_Three-Body_Problem_(novel) https://en.wikipedia.org/wiki/The_Three-Body_Problem_(novel)