We are more likely to get better short wave gravitational wave modes from stellar mass black holes.
LC On Saturday, September 3, 2022 at 9:47:46 PM UTC-5 [email protected] wrote: > It should be great chance to see if there are any second and higher order > distortion in black hole collisions. We don't have exact solutions > describing black hole mergers, so we know they quickly settle down to > simple ellipsoids (the no-hair theorem) but I would be good to know our > approximate solutions haven't thrown away some short wave ripples. > > Brent > > > On 9/3/2022 7:19 AM, John Clark wrote: > > A prediction has been made that 2 supermassive black holes in a galaxy 1.1 > billion light years away will collide within the next 3 years. The galaxy > has a core that is extremely bright in optical, ultraviolet and x-rays and > the interesting thing is the intensity of the radiation fluctuates and the > period of the fluctuations has been shortening, just three years ago the > fluctuation was about one year long but today it's only about one month. > There could be several reasons for this but the most obvious one is that 2 > supermassive black holes, each with about 100,000,000 solar masses, had an > orbital period of one year back in 2019 but an orbital period of only one > month today; if that is indeed the case then they are orbiting faster and > faster and thus getting closer and closer together and should collide > sometime within the next 3 years, perhaps even this year. Such a collision > would produce enormously powerful gravitational waves but LIGO will not be > able to see them because the longest frequency wave it can detect is about > a 10th of a second and colliding supermassive Black Holes would produce > gravitational waves with a period of hours or days; however such waves > might be detectable by observing simultaneous tiny changes in the frequency > of pulsars located in widely separated places; this is because the > gravitational waves would slightly move the Earth and thus slightly change > the observed frequency of the pulsars in a way that was consistent with > their location relative to us. > > The great thing about this prediction is that we'll know if it's right or > wrong within the next 3 years. > > Tick-Tock: The Imminent Merger of a Supermassive Black Hole Binary > <https://arxiv.org/pdf/2201.11633.pdf> > > John K Clark See what's on my new list at Extropolis > <https://groups.google.com/g/extropolis> > bb9 > > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/CAJPayv0zN6WVgr43DUsSJy3Jav9Lp2dezTRTQ9pCYun4NFDQCQ%40mail.gmail.com > > <https://groups.google.com/d/msgid/everything-list/CAJPayv0zN6WVgr43DUsSJy3Jav9Lp2dezTRTQ9pCYun4NFDQCQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/975c0ea8-d936-4d29-bb3b-b0a1e617368dn%40googlegroups.com.
