期刊
PHYSICAL REVIEW LETTERS
卷 115, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.115.211105
关键词
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资金
- European Union's Seventh Framework Programme (FP7/PEOPLE-CIG) through the Marie Curie Career Integration Grant [GALFORMBHS PCIG11-GA-2012-321608]
- NSF CAREER Grant [PHY-1250636]
- JSPS
- [StronGrHEP-690904]
- [H2020-MSCA-RISE-2015]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1305682] Funding Source: National Science Foundation
Gravity theories beyond general relativity typically predict dipolar gravitational emission by compact-star binaries. This emission is sourced by sensitivity parameters depending on the stellar compactness. We introduce a general formalism to calculate these parameters, and show that in shift-symmetric Horndeski theories stellar sensitivities and dipolar radiation vanish, provided that the binary's dynamics is perturbative (i.e., the post-Newtonian formalism is applicable) and cosmological-expansion effects can be neglected. This allows one to reproduce the binary-pulsar-observed orbital decay.
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