The eclipsing X-ray pulsar X-7 in M33

被引：15

作者：

Dubus, G

Charles, PA

Long, KS

Hakala, PJ

Kuulkers, E

机构：

[1] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England

[2] Observ Paris, CNRS, CNRS, UPR 176,DARC, F-92195 Meudon, France

[3] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[4] UCL, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England

[5] Univ Helsinki, Observ & Astrophys Lab, FIN-00014 Helsinki, Finland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1999年 / 302卷 / 04期

关键词：

binaries : eclipsing; galaxies : individual : M33; Local Group; X-rays : stars;

D O I：

10.1046/j.1365-8711.1999.02158.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using our extensive ROSAT X-ray observations of M33, we confirm a 3.45-d eclipse period for the Einstein source X-7 proposed by Larson & Schulman and discover evidence for a 0.31-s pulse period. The orbital period, pulse period and observed X-ray luminosity are remarkably similar to those of the Small Magellanic Cloud high-mass X-ray binary SMC X-l, We therefore suggest that M33 X-7 is a neutron star high-mass X-ray binary with a 15-40 M. O/B companion and a binary separation of 25-33 R. if the companion is almost filling its Roche lobe.

引用

页码：731 / 734

页数：4

共 21 条

[1]

[Anonymous], 1995, X-ray Binaries

[2] CONFIDENCE-INTERVALS FROM THE RAYLEIGH TEST [J].