TY - JOUR
T1 - Search for Tensor, Vector, and Scalar Polarizations in the Stochastic Gravitational-Wave Background
AU - Abbott, B.P.
AU - Abbott, R.
AU - Abbott, T.D.
AU - Acernese, F.
AU - Ackley, K.
AU - Adams, C.
AU - Adams, T.
AU - Addesso, P.
AU - Adhikari, R.X.
AU - Adya, V.B.
AU - Affeldt, C.
AU - Afrough, M.
AU - Agarwal, B.
AU - Agathos, M.
AU - Agatsuma, K.
AU - Aggarwal, N.
AU - Aguiar, O.D.
AU - Aiello, L.
AU - Ain, A.
AU - Ajith, P.
AU - Allen, B.
AU - Allen, G.
AU - Allocca, A.
AU - Altin, P.A.
AU - Amato, A.
AU - Ananyeva, A.
AU - Anderson, S.B.
AU - Anderson, W.G.
AU - Angelova, S.V.
AU - Antier, S.
AU - Appert, S.
AU - Arai, K.
AU - Araya, M.C.
AU - Areeda, J.S.
AU - Arnaud, N.
AU - Ascenzi, S.
AU - Ashton, G.
AU - Ast, M.
AU - Aston, S.M.
AU - Astone, P.
AU - Atallah, D.V.
AU - Aufmuth, P.
AU - Aulbert, C.
AU - AultONeal, K.
AU - Danilishin, S.L.
AU - Hennig, J.
AU - Hild, S.
AU - Steinlechner, J.
AU - Steinlechner, S.
AU - van den Brand, J.F.J.
AU - LIGO Scientific Collaboration
AU - Virgo Collaboration
PY - 2018/5/16
Y1 - 2018/5/16
N2 - 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 genetically 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 Omega(T)(0) < 5.58 x 10(-8), Omega(V)(0) < 6.35 x 10(-8), and Omega(S)(0) < 1.08 x 10(-7) at a reference frequency f(0) = 25 Hz.
AB - 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 genetically 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 Omega(T)(0) < 5.58 x 10(-8), Omega(V)(0) < 6.35 x 10(-8), and Omega(S)(0) < 1.08 x 10(-7) at a reference frequency f(0) = 25 Hz.
KW - TOOL
KW - EFFICIENT
KW - RADIATION
U2 - 10.1103/PhysRevLett.120.201102
DO - 10.1103/PhysRevLett.120.201102
M3 - Article
SN - 0031-9007
VL - 120
JO - Physical Review Letters
JF - Physical Review Letters
IS - 20
M1 - 201102
ER -