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Questions tagged [gravitational-waves]

Waves in spacetime formed by the acceleration of massive bodies. A passing wave causes spacetime to be stretched and squashed by a very small amount. Typically we can only detect the most energic gravitational events such as black hole mergers.

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If a Milky Way supernova were to happen, how long would it take for astronomers to be notified?

If a Supernova were to happen in the Milky Way, how long would it take for astronomers to be notified? How long would it take for the people running the gravitational wave and neutrino detectors to ...
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Gravitational recoil with stars/planets...?

When two black holes are merging, the resulting merge can be ejected if one of the black holes had less mass than the other one, so the gravitational waves emitted by both of them is unbalanced, and ...
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When a supernova emits gravitational waves do they have momentum and does the supernova recoil to conserve momentum?

In a perfectly symmetrical supernova explosion presumably the net recoil would be zero.But would there be a recoil due to the emission of gravitational waves in a more realistic asymmetrical explosion?...
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How would white light cavities (WLC) work for gravitational wave detection?

A study done by Michael A. Page, Maxim Goryachev, Haixing Miao, and peers states that WLCs can be used to improve the sensitivity of LIGO. LIGO currently uses photons (for very constant speed at which ...
Gursimran Randhawa's user avatar
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Does matter absorb/scatter gravitational waves?

When photons pass through matter, they do tend to get absorbed by that matter to some degree depending on the properties of the photon and and the matter. Even the brightest light is at least somewhat ...
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What does "GPU-accelerated butterfly matched filtering over dense bank of time-symmetric chirp-like templates" mean? (GW170817)

A new analysis of gravitational wave (and other data) from GW170817 on 2017-Aug-17 has been published, strongly suggesting that the merger of two neutron stars resulted in a large, rapidly rotating ...
uhoh's user avatar
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In what year (2014?) the gravitational wave triggered by this merger was possibly generated?

Re: "A transient radio source consistent with a merger-triggered core collapse supernova" https://www.science.org/doi/10.1126/science.abg6037 Actually the described merger consisted of two ...
Alex's user avatar
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What is the gravitational wave spectrum of an ellipsoid neutron star like?

If the star is ellipsoid instead a sphere, the wave should be rich of harmonics, not only (2*orbital frequency). Can these harmonics behave the same way, i.e. they appear/disappear together and drift (...
Chen's user avatar
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Can the expansion of spacetime be directly measured with laser interferometry (like GW can)

LIGO has a mind boggling sensitivity. What would it take to directly measure the expansion of spacetime, along the laser beam? I suppose it could be done at interplanetary scale.
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A thought experiment for gravitational waves

My question is: I want to in a thought experiment, calculate the gravitational waves that are generated while I Shake my hands? -A hand mass:~400 gr & Frequency: 3 times per second. Here is what I ...
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$v_{GW}$ near a binary star?

In empty space, at large distances from masses and at small amplitudes, GWs propagate at the speed of light. This does not apply near the source, because there is a large mass and the amplitude of the ...
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Can gravitational waves cause a large asymmetric planet to spin?

As planets orbit Earth it won't be perfectly spherical because of gravity But can gravitational waves make the asymmetrical Earth spin a little?
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Binary star system effects at the barycenter

I haven't been able to find anything on this so far. Using Alpha Centauri as the study, what events/effects ( if any ) would happen between the two stars? More specifically, between the gravitational ...
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