Isolated black holes (BHs) don't emit gravity waves. A pair of BHs (binary BHs) do in the final stages of coalescence (merger). Some supermassive black holes found in the centers of galaxies are actually a binary pair of SMBH. It takes a Hubble scale length of time (billions of years) before these two massive objects get really close to each other. Then within seconds the pair merge, releasing gravitational waves.
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Feel free to reply to any comment by clicking the "Reply" button.You know, I remember back in the 80s first hearing about black holes from the late great Carl S. I mean for we laymen. Since then they have become massive BHs, super massive BHs, down to mini BHs that sneak up and get you when you're not looking. They used to be part of the universe, now they're the only game in town. Okay, I'm exaggerating, but these things have become the stuff of wild imagination. Portals to other galaxies, universes and time dimensions and so on, and I'm confessing I've started to become a bit resistant to the term black hole.
With apologies to you professor. I'm sure they are key to the universe. I'm trying not to get jaded about them. Blame the science fiction crowd I guess.
David1955
Level 8
Sep 19, 2018
0
res ipsa loquitur
magicwatch
Level 7
Sep 18, 2018
0
@TheAstroChuck Leonardo considered English la lingua pura because, "It was beyond the corrupting forces of the Vatican". so now this is the opposite ,
good to hear your comments, though sometimes think it is pearls before swine
magicwatch
Level 7
Sep 18, 2018
0
How can they not be emitting gravity waves when they are pulling in stars and the pair of BHs eventually merge? Sounds like gravity!
dare2dream
Level 7
Sep 18, 2018
0
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