Gravitational-radiation losses from the pulsar-white-dwarf binary PSR J1141-6545

Simple item page
dc.creatorBhat, N. D. Ramesh
dc.creatorBailes, Matthew
dc.creatorVerbiest, Joris P. W.
dc.date2008-04-07
dc.date.accessioned2026-07-07T11:49:38Z
dc.date.available2026-07-07T11:49:38Z
dc.descriptionPulsars in close binary orbit around another neutron star or a massive white dwarf make ideal laboratories for testing the predictions of gravitational radiation and self-gravitational effects. We report new timing measurements of the pulsar-white-dwarf binary PSR J1141-6545, providing strong evidence that such asymmetric systems have gravitational wave losses that are consistent with general relativity. The orbit is found to be decaying at a rate of $1.04\pm0.06$ times the general relativistic prediction and the Shapiro delay is consistent with the orbital inclination angle derived from scintillation measurements. The system provides a unique test-bed for tensor-scalar theories of gravity; our current measurements place stringent constraints in the theory space, with a limit of $α_0^2 < 2.1 \times 10^{-5}$ for weakly non-linear coupling and an asymptotic limit of $α_0^2 < 3.4 \times 10^{-6}$ for strongly non-linear coupling, where $α_0$ is the linear coupling strength of matter to an underlying scalar field. This asymptotic limit is nearly three times smaller than the Cassini bound ($α_0^2 \approx 10^{-5}$).
dc.description4 pages, 2 figures, To Appear in Physical Review D
dc.identifierhttps://arxiv.org/abs/0804.0956
dc.identifierhttp://arxiv.org/abs/0804.0956
dc.identifierPhys.Rev.D77:124017,2008
dc.identifierdoi:10.1103/PhysRevD.77.124017
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203304
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleGravitational-radiation losses from the pulsar-white-dwarf binary PSR J1141-6545
dc.typetext

Files

Collections

arXiv