If quite a bit of energy in the universe were tied up in gravitational wavesCraig Willford wrote:
If power output from the conversion of 3 solar masses to gravitational waves put out, for that fractional second, 50 times that of the whole universe, perhaps quite a bit of energy in the universe is tied up in gravitational waves still rippling.
then we would have easily detected gravitational waves before 2015.
An insignificant proportion of the ~1079 gravitons released will ever be absorbed.Craig Willford wrote:
Of course that energy gets absorbed (else LIGO would not have been able to detect it). How much did this event in September heat up the Earth? I presume it is indetectably small.
It is way, way too weak and at the wrong frequency.Craig Willford wrote:
How much did this event in September heat up the Earth? I presume it is indetectably small.
The Earth has vibrational normal modes with periods on the order of an hour.
Now, if the 4 million solar mass black hole at the center of the Milky Way turns out to be 2 closely orbiting 2 million solar mass black holes (with a period on the order of an hour) then they might generate enough strong low frequency gravitational waves to excite detectable Earth vibrational normal modes.