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peacewar1
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Hi, Guys. So i am doing a research paper on gravitational waves. As I read through review articles on gravitational waves and LIGO, I don't quite get a few points. The materials are really dense and I don't have the math and physics level to back it up. But I am really interested in the topic.
1) So first of all, I think one article is saying that gravitational waves have this quadrupole moment which allows it to occur. But how does quadrupole moment plays a part in binary star systems such as the neutron stars spin down. What is the connection? I can see energy loses in the system is being emitted as gravitational waves.
2) "LIGO should be able to detect gravitational waves as small as h \approx 5\times 10^{-22}"(WIKI) Using the h strength of gws equation, we approximate the magnitude of the gws to be detected in galaxy. But where in the galaxy? What is the Hubble distance? I know this h equation approximates the order of accuracy in LIGO. But how did it come about?
3) Why GWs are detected in amplitude instead of frequency? Aren't we detecting gws base on the strength(as in magnitude of energy) of it.
4)How do we know if we pick up the GWs signal? This is very ambiguous. One article i read said they derived equation to come up with the GWs signal in form of radio-wave. I know they detect the waves in the photodiode where the two beams in LIGO are measured to see if they are out of phrase.
Thank you guys so much.
1) So first of all, I think one article is saying that gravitational waves have this quadrupole moment which allows it to occur. But how does quadrupole moment plays a part in binary star systems such as the neutron stars spin down. What is the connection? I can see energy loses in the system is being emitted as gravitational waves.
2) "LIGO should be able to detect gravitational waves as small as h \approx 5\times 10^{-22}"(WIKI) Using the h strength of gws equation, we approximate the magnitude of the gws to be detected in galaxy. But where in the galaxy? What is the Hubble distance? I know this h equation approximates the order of accuracy in LIGO. But how did it come about?
3) Why GWs are detected in amplitude instead of frequency? Aren't we detecting gws base on the strength(as in magnitude of energy) of it.
4)How do we know if we pick up the GWs signal? This is very ambiguous. One article i read said they derived equation to come up with the GWs signal in form of radio-wave. I know they detect the waves in the photodiode where the two beams in LIGO are measured to see if they are out of phrase.
Thank you guys so much.
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