Quote:
Originally Posted by bojan
Interesting...
Do we have estimation how much energy was converted into GW since BB?
It may be a significant amount, and was "lost" ... except for gravitational effects (it become part of dark matter).
|
The short answer is we don't know.
A major source of GWs should theoretically originate from the inflation stage of the Universe some 10^-36 sec after the BB.
Unlike the initial high frequency of GW150914 which was detected by LIGO, these extremely low frequency primordial GWs can only be indirectly detected by measuring a particular type of polarization of the CMB (Cosmic Microwave Background).
Unfortunately in one of the great "stuff ups" of modern cosmology the observed polarization can also be caused by photons from the CMB reflecting off magnetized dust in our own galaxy.
Scientists underestimated this phenomena in making a premature announcement of the discovery of GWs from the inflation period.
http://physicsworld.com/cws/article/...nal-wave-claim
Since these GWs are masked by local effects, we don't know how much energy has been carried away by GWs since the BB.