[ExI] Gravitational Waves Detected By LIGO!
Tomaz Kristan
protokol2020 at gmail.com
Sun Feb 14 18:56:06 UTC 2016
> How did you calculate that "
at least one every second
" figure?
10^11 galaxies with a supermassive black hole.
An average supermassive has about several 10^6 small black hole mass.
This is about several*10^17 small black holes already collided. Either as
two small black holes, either as a black hole and a (neutron) star, either
as supermassive an a star ...
The number of seconds after the Big Bang is also several*10^17.
Roughly one per second in the past, now it's probably much faster. But
perhaps bigger black holes collide now.
But roughly, we are there about.
OR
>From 10^23 stars in our (observable) Universe and that at least 1 of 10000
stars in our own galaxy has already fallen to Sagittarius ... if this is an
average, then 10^19 stars has already fallen in. And they keep do that.
Roughly my numbers.
On Sun, Feb 14, 2016 at 5:06 PM, John Clark <johnkclark at gmail.com> wrote:
> On Sun, Feb 14, 2016 at 2:52 AM, Tomaz Kristan <protokol2020 at gmail.com>
> wrote:
>
> >
>> You may be right, The fact that LIGO is currently down can explain a lot.
>> But when it will go online again, we will see. If there will not be very
>> frequent detections, of a much greater events also, this one was a fluke.
>> For there is a constant rain of black holes onto those supermassives. Have
>> to be.
>> [...]
>> By "rain" I mean at least one every second in the observable Universe.
>> Had to be, for number reasons.
>>
>
> The number of gravity wave events that LIGO will be able to detect
> depends on:
>
> 1) How big the black holes that merge are.
> 2) How far away the black holes are.
> 3) How common the much weaker source of 2 neutron stars merging is.
> 4) How sensitive LIGO is.
>
> How did you calculate that "
> at least one every second
> " figure?
>
> John K Clark
>
>
>
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