[time-nuts] LIGO detects gravitational waves

Hal Murray hmurray at megapathdsl.net
Sat Feb 13 20:50:29 UTC 2016


tvb at LeapSecond.com said:
> It's not just black holes (BH) but also neutron stars (NS) ....

If anybody is interested in neutron stars, the SLAC public lecture a few 
weeks ago was very good.

Supernovas: Gravity-powered Neutrino Bombs
https://www6.slac.stanford.edu/community/past-lectures/supernovas-gravity-powe
red-neutrino-bombs
http://youtube.com/watch?v=HiCRTUxgwPY

When a star runs out of fuel, it collapses.  If it's in the right size range, 
it turns into a neutron star.  That collapse takes 1 ms and involves speeds 
up to c/4 - all due to gravity.  Neutron stars are so dense that it takes 10 
seconds for neutrinos to diffuse out because they keep buming into stuff.  
"diffuse" and neutrinos?

It will be interesting to see if/when LIGO picks one up.  I assume they will 
if it's near enough, but I don't want to be too near.


-- 
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