[ExI] LIGO

[John Clark]

A new analysis in the journal Nature
​by ​
Krzysztof Belczynski
​ ​
predicts that when LIGO
​ ​
reaches
​ ​
full sensitivity in 3
​to​
 4 years it will
​see ​
Black Hole mergers in the 20 to 80 solal mass range about once every 9 hours
​,​
assuming the Black Holes came from dead stars and not from the first
nanosecond of the Big Bang
​,​
if some Black Holes are primordial it would happen more often. Since it's
pretty easy to determine from how far away the gravitational waves
​came ​
and with
​at​
 least a​
thousand
​new ​
data points a year we should be able map out the entire universe,
​including ​
​both​

​dark matter
 and regular matter
, with unprecedented detail.

Unfortunately Belczynski
​ ​
also predicts we'll only see
​ ​
about
​ ​
one collision between 2 neutron stars a year because of their much weaker
gravitational waves. Oh well you can't have everything.

​ ​
John K Clark
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