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Title
Tests of General Relativity with GW150914
Author(s)
LIGO Scientific Collaboration and Virgo Collaboration강궁원김남규김정리장행진조희석
Publication Year
2016-05-31
Abstract
The LIGO detection of GW150914 provides an unprecedented opportunity to study the two-bodymotion of a compact-object binary in the large-velocity, highly nonlinear regime, and to witness the finalmerger of the binary and the excitation of uniquely relativistic modes of the gravitational field.We carry outseveral investigations to determine whether GW150914 is consistent with a binary black-hole merger ingeneral relativity. We find that the final remnant’s mass and spin, as determined from the low-frequency(inspiral) and high-frequency (postinspiral) phases of the signal, are mutually consistent with the binaryblack-hole solution in general relativity. Furthermore, the data following the peak of GW150914 areconsistent with the least-damped quasinormal mode inferred from the mass and spin of the remnant blackhole. By using waveform models that allow for parametrized general-relativity violations during theinspiral and merger phases, we perform quantitative tests on the gravitational-wave phase in the dynamicalregime and we determine the first empirical bounds on several high-order post-Newtonian coefficients.Weconstrain the graviton Compton wavelength, assuming that gravitons are dispersed in vacuum in the sameway as particles with mass, obtaining a 90%-confidence lower bound of 1013 km. In conclusion, within ourstatistical uncertainties, we find no evidence for violations of general relativity in the genuinely strong-fieldregime of gravity.
Keyword
GW150914; Testing general relativity
Journal Title
Phys.Rev.Lett.
Citation Volume
116
ISSN
0031-9007
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7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14598
http://www.ndsl.kr/ndsl/search/detail/article/articleSearchResultDetail.do?cn=NART78511528
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