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 <johnkcl...@gmail.com> wrote:

>
> On Fri, Feb 12, 2016 at 7:57 AM, Terren Suydam <terren.suy...@gmail.com>
> 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
>
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