Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/114235
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Type: Journal article
Title: Search for tensor, vector, and scalar polarizations in the stochastic gravitational-wave background
Author: Abbott, B.
Abbott, R.
Abbott, T.
Acernese, F.
Ackley, K.
Adams, C.
Adams, T.
Addesso, P.
Adhikari, R.
Adya, V.
Affeldt, C.
Afrough, M.
Agarwal, B.
Agathos, M.
Agatsuma, K.
Aggarwal, N.
Aguiar, O.
Aiello, L.
Ain, A.
Ajith, P.
et al.
Citation: Physical Review Letters, 2018; 120(20):201102-1-201102-13
Publisher: American Physical Society
Issue Date: 2018
ISSN: 0031-9007
1079-7114
Statement of
Responsibility: 
Daniel D Brown … Huy T Cao … Miftar Ganija … Won Kim … Eleanor J King … Jesper Munch … David J Ottaway … Peter J Veitch … et al.
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 log-uniform 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=25  Hz.
Keywords: LIGO Scientific Collaboration and Virgo Collaboration
Rights: © 2018 American Physical Society
RMID: 0030090013
DOI: 10.1103/PhysRevLett.120.201102
Appears in Collections:Physics publications

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