Thanks John, interesting. Does current theory make any predictions on how much energy (electro-magnetic and otherwise) actually is produced during ring-down, despite the inability to observe it due to the event horizon?
On Fri, Feb 12, 2016 at 11:37 AM, John Clark <[email protected]> wrote: > > On Fri, Feb 12, 2016 at 7:57 AM, Terren Suydam <[email protected]> > wrote: > > > >> I thought the gravitational waves were generated as the black holes >> rotated around one another, not (merely) as a consequence of the collision. >> Also, what kinds of interactions transfer the energy/mass of the black >> holes themselves into gravitational waves? >> > > Every time a mass accelerates gravity waves are produced, the greater the > mass and the faster the acceleration the stronger the wave. > > Even the Earth produces a very small amount of Gravitational Waves as it > accelerates in its orbit around the sun, and the energy to produce the > waves comes from slowing down Earth's orbital speed and the orbit shrinks > as a result, but not by much. Each year the Earth gets > > 3.5×10^−13 > > meters > > closer to the sun > due to gravity waves > , about 1/300 the diameter of a hydrogen atom. > > When 2 black holes merge most of the waves > > are produced > > in a phase called "ring down"; when they first merge they are irregularly > shaped but > > black holes want to be spherical > > and so start vibrating radically > and that > produces > > the most intense gravity waves in the universe > , > > but > after about a fifth of a second > they > have stop > > vibrating > and > got > ten > rid of their irregularities and become spherical. > > It > took > 3 solar masses of energy to produce those gravity waves, if it had been > light > produced not gravity waves > during that fifth of a second > it would have been > 50 times brighter than everything else in the observable universe put > together > . > > > John K Clark > > -- > 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 post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/everything-list. > For more options, visit https://groups.google.com/d/optout. > -- 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 post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
