[ExI] Primordial Black Holes

[John Clark]

The January 4 2017 event gives more support to the idea Dark Matter
​is​

​made of ​
primordial Black Holes born a nanosecond after the Big
​B​ang
 and were never stars. The spin of one of the Black
​H​
oles is not in the same direction
​as ​
the other
​​
and
​of ​
​their orbit,
 binary stars almost always are. If there were born at different times and
at different places the universe is now so spread out it is unlikely there
would be enough time for the two to find each
​other ​
and go into orbit, but very very early in the universe thing
​s​
were much more crowded and that would be more likely to happen.  If LIGO
can eve
​r​
find a merger where one of the Black Holes was less than 3 solar masses
that would be the smoking gun, that
​guy ​
would have to be primordial.

In addition, some rival theories to Einstein's say gravitational waves
don't all travel at the same speed but depends on their frequency, this
merger was twice as far away as the previous two so it's the best test yet
of that , and Einstein wins again, all the waves move at the same speed
(presumably light speed) regardless of frequency.

John K Clark
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