The orbit of the binary X-ray pulsar 4U 1538-52 from Rossi X-ray Timing Explorer observations

被引：38

作者：

Clark, GW ^{[1
]}

机构：

[1] MIT, Ctr Space Res, Cambridge, MA 02139 USA

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 542卷 / 02期

关键词：

binaries : eclipsing; pulsars : individual (4U 1538-52); X-rays : stars;

D O I：

10.1086/312926

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Improved orbital parameters of the high-mass binary X-ray pulsar 4U 1538-52 have been derived from high count rate data obtained from the Rossi X-Ray Timing Explorer. Pulse-timing analysis yields an eccentricity of 0.174 +/- 0.015, a periastron at 64 degrees +/- 9 degrees, and evidence of orbital decay with P-orb/P-orb = (-2.9 +/- 2.1) x 10(-6) yr(-1).

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页码：L131 / L133

页数：3

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