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Gravitational wave memory: A new approach to study modified gravity

Du, Song Ming and Nishizawa, Atsushi (2016) Gravitational wave memory: A new approach to study modified gravity. Physical Review D, 94 (10). Art. No. 104063. ISSN 2470-0010. doi:10.1103/PhysRevD.94.104063.

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It is well known that two types of gravitational wave memory exist in general relativity (GR): the linear memory and the nonlinear, or Christodoulou, memory. These effects, especially the latter, depend on the specific form of the Einstein equation. It can then be speculated that, in modified theories of gravity, the memory can differ from the GR prediction and provides novel phenomena to study these theories. We support this speculation by considering scalar-tensor theories, for which we find two new types of memory: the T memory and the S memory, which contribute to the tensor and scalar components of a gravitational wave, respectively. Specifically, the former is caused by the burst of energy carried away by scalar radiation, while the latter is intimately related to the no scalar hair property of black holes in scalar-tensor gravity. We estimate the size of these two types of memory in gravitational collapses and formulate a detection strategy for the S memory, which can be singled out from tensor gravitational waves. We show that (i) the S memory exists even in spherical symmetry and is observable under current model constraints, and (ii) while the T memory is usually much weaker than the S memory, it can become comparable in the case of spontaneous scalarization.

Item Type:Article
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URLURL TypeDescription Paper
Nishizawa, Atsushi0000-0003-3562-0990
Additional Information:© 2016 American Physical Society. (Received 27 May 2016; published 29 November 2016) We thank Yanbei Chen for the discussions and the comments on the manuscript. The research of S. M. D. and A. N. was supported by the National Science Foundation, Grants No. PHY-1404569 and No. PHY-1055103, and the Brinson Foundation. The research of A. N. was also supported by the Japan Society for the Promotion of Science and the H2020-MSCA-RISE-2015 Grant No. StronGrHEP-690904.
Funding AgencyGrant Number
Brinson FoundationUNSPECIFIED
Japan Society for the Promotion of Science (JSPS)UNSPECIFIED
European Research Council (ERC)StronGrHEP-690904
Issue or Number:10
Record Number:CaltechAUTHORS:20161129-111028324
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Official Citation:Gravitational wave memory: A new approach to study modified gravity Song Ming Du and Atsushi Nishizawa Phys. Rev. D 94, 104063
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72404
Deposited By: George Porter
Deposited On:29 Nov 2016 20:30
Last Modified:11 Nov 2021 05:00

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