All Questions
7
questions
3
votes
1
answer
75
views
LIGO et al: Is it possible to estimate the frequency of GW+EM detections?
In the past few years LIGO and VIRGO have detected a multitude of gravitational events. As far as I know however only GW170817 had a verifiable EM counterpart. Shouldn't it be possible, based on ...
- 1,103
1
vote
2
answers
383
views
Frequency sensitivity of gravitational wave interferometer with its armlength and with mass of the mergers
To the best of my knowledge, LIGO is capable of observing gravitational waves (GW) from stellar mass black hole (BH) mergers but not mergers of supermassive black holes. In order to detect the latter ...
- 26.8k
1
vote
0
answers
39
views
How are black hole masses calculated from gravitational waves? [duplicate]
I would like to know what data is used from gravitational wave detections to calculate black hole masses and how.
Also, what else can you deduce from gravitational wave detections? What was the exact ...
- 11
1
vote
1
answer
67
views
Where does the rate of mergers per halo in the "Did LIGO detect dark matter?" paper come from?
It was recently proposed that dark matter (DM) could be made of primordial black holes (PBHs) of $\sim 30 M_{\odot}$, like the first ones detected by LIGO. This idea was written in "Did LIGO detect ...
- 13
10
votes
1
answer
178
views
What LIGO should detect that it has not yet?
What would the lack of detection of such phenomena tell us about the Universe?
What should be the most frequent signals detected, theoretically speaking? I'm a lay person in the area, so you might ...
- 407
5
votes
3
answers
344
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How would we estimate, ahead of time, "the chances" of LIGO spotting black holes colliding in the period that it has been operating? [duplicate]
Can anyone summarize calculations that have been done about the theoretical probability of a detectable black hole collision happening in the observable universe within the time that LIGO has been ...
- 1,272
0
votes
0
answers
86
views
Evidence of possible tidal effects close to a gravitational wave emitting system
Currently we are attempting to detect gravitational wave emissions using the LIGO gravitational wave detection system (and similiar systems), by attempting to detect very weak gravitational waves ...
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