High-resolution spectroscopy of the low-mass X-ray binary EXO 0748-67

被引：50

作者：

Cottam, J

Kahn, SM

Brinkman, AC

den Herder, JW

Erd, C

机构：

[1] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

[2] SRON, Space Res Lab, NL-3584 CA Utrecht, Netherlands

[3] European Space Agcy, Estec, Dept Space Sci, Div Astrophys, NL-2200 AG Noordwijk, Netherlands

来源：

ASTRONOMY & ASTROPHYSICS | 2001年 / 365卷 / 01期

关键词：

stars : individual : EXO 0748-67; binaries : eclipsing; X-rays : stars;

D O I：

10.1051/0004-6361:20000053

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present initial results from observations of the low-mass X-ray binary EXO 0748-67 with the Reflection Grating Spectrometer on board the XMM-Newton Observatory. The spectra exhibit discrete structure due to absorption and emission from ionized neon, oxygen, and nitrogen. We use the quantitative constraints imposed by the spectral features to develop an empirical model of the circumsource material: This consists of a thickened accretion disk with emission and absorption in the plasma orbiting high above the binary plane. This model presents challenges to current theories of accretion in X-ray binary systems.

引用

页码：L277 / L281

页数：5

共 12 条

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