Testing massive-field modifications of gravity via gravitational waves. (arXiv:1905.11859v1 [gr-qc])
<a href="http://arxiv.org/find/gr-qc/1/au:+Yamada_K/0/1/0/all/0/1">Kei Yamada</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Narikawa_T/0/1/0/all/0/1">Tatsuya Narikawa</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Tanaka_T/0/1/0/all/0/1">Takahiro Tanaka</a>
The direct detection of gravitational waves now provides a new channel of
testing gravity theories. Despite that the parametrized post-Einsteinian
framework is a powerful tool to quantitatively investigate effects of
modification of gravity theory, the gravitational waveform in this framework is
still extendable. One of such extensions is to take into account the gradual
activation of dipole radiation due to massive fields, which are still only very
weakly constrained if their mass $m$ is greater than $10^{-16}$ eV from pulsar
observations. Ground-based gravitational-wave detectors, LIGO, Virgo, and
KAGRA, are sensitive to this activation in the mass range, $10^{-14}$ eV
$lesssim m lesssim 10^{-13}$ eV. Hence, we discuss a dedicated test for
dipole radiation due to a massive field using the LIGO-Virgo collaboration’s
open data. In addition, assuming Einstein-dilaton-Gauss-Bonnet (EdGB) type
coupling, we combine the results of the analysis of the binary black hole
events to obtain the 90% CL constraints on the coupling parameter $alpha_{rm
EdGB}$ as $sqrt{alpha_{rm EdGB}} lesssim 2.6$ km for any mass less than $6
times 10^{-14}$ eV for the first time, including $sqrt{alpha_{rm EdGB}}
lesssim 1.9$ km in the massless limit.
The direct detection of gravitational waves now provides a new channel of
testing gravity theories. Despite that the parametrized post-Einsteinian
framework is a powerful tool to quantitatively investigate effects of
modification of gravity theory, the gravitational waveform in this framework is
still extendable. One of such extensions is to take into account the gradual
activation of dipole radiation due to massive fields, which are still only very
weakly constrained if their mass $m$ is greater than $10^{-16}$ eV from pulsar
observations. Ground-based gravitational-wave detectors, LIGO, Virgo, and
KAGRA, are sensitive to this activation in the mass range, $10^{-14}$ eV
$lesssim m lesssim 10^{-13}$ eV. Hence, we discuss a dedicated test for
dipole radiation due to a massive field using the LIGO-Virgo collaboration’s
open data. In addition, assuming Einstein-dilaton-Gauss-Bonnet (EdGB) type
coupling, we combine the results of the analysis of the binary black hole
events to obtain the 90% CL constraints on the coupling parameter $alpha_{rm
EdGB}$ as $sqrt{alpha_{rm EdGB}} lesssim 2.6$ km for any mass less than $6
times 10^{-14}$ eV for the first time, including $sqrt{alpha_{rm EdGB}}
lesssim 1.9$ km in the massless limit.
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