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Title
Search for Tensor, Vector, and Scalar Polarizations in the Stochastic Gravitational-Wave Background
Author(s)
B.P. Abbott et al.강궁원배상욱
Publication Year
2018-05-16
Abstract
The detection of gravitational waves with Advanced LIGO and Advanced Virgo has enabled novel tests
of general relativity, including direct study of the polarization of gravitational waves. While general
relativity allows for only two tensor gravitational-wave polarizations, general metric theories can
additionally predict two vector and two scalar polarizations. The polarization of gravitational waves is
encoded in the spectral shape of the stochastic gravitational-wave background, formed by the superposition
of cosmological and individually unresolved astrophysical sources. Using data recorded by Advanced
LIGO during its first observing run, we search for a stochastic background of generically polarized
gravitational waves. We find no evidence for a background of any polarization, and place the first direct
bounds on the contributions of vector and scalar polarizations to the stochastic background. Under loguniform
priors for the energy in each polarization, we limit the energy densities of tensor, vector, and scalar
modes at 95% credibility to ΩT0
< 5.58 × 10−8, ΩV0
< 6.35 × 10−8, and ΩS0
< 1.08 × 10−7 at a reference
frequency f0
¼ 25 Hz.
Keyword
Stochastic Gravitational-Wave; Polarization
Journal Title
PHYSICAL REVIEW LETTERS
Citation Volume
120
ISSN
0031-9007
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Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14778
http://www.ndsl.kr/ndsl/search/detail/article/articleSearchResultDetail.do?cn=NART90661242
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