期刊
ASTROPHYSICAL JOURNAL
卷 632, 期 2, 页码 1060-1068出版社
UNIV CHICAGO PRESS
DOI: 10.1086/432526
关键词
binaries : close; pulsars : individual ( PSR J1751-2857, PSR J1853+1303, PSR J1910+1256); relativity
We report the discovery of three binary millisecond pulsars during the Parkes Multibeam Pulsar Survey of the Galactic plane. The objects are highly recycled and are in orbits of many tens of days about low-mass white dwarf companions. The eccentricity of one object, PSR J1853+1303, is more than an order of magnitude lower than predicted by the theory of convective fluctuations during tidal circularization. We demonstrate that under the assumption that the systems are randomly oriented, current theoretical models of the core-mass-orbital-period relation for the progenitors of these systems likely overestimate the white dwarf masses, strengthening previous concerns about the match of these models to the data. The new objects allow us to update the limits on the violation of relativistic equivalence principles to 95% confidence upper limits of 5: 6; 10(-3) for the strong equivalence principle parameter vertical bar Delta vertical bar and 4.0 x 10(-20) for the Lorentz-invariance/momentum-conservation parameter vertical bar(alpha) over cap (3)vertical bar
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