High-resolution X-ray spectroscopy of the accretion disk corona source 4U 1822-37

被引：23

作者：

Cottam, J

Sako, M

Kahn, SM

Paerels, F

Liedahl, DA

机构：

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

[2] Columbia Univ, Dept Phys, New York, NY 10027 USA

[3] Lawrence Livermore Natl Lab, Dept Phys & Adv Technol, Livermore, CA 94550 USA

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 557卷 / 02期

基金：

美国国家航空航天局;

关键词：

accretion; accretion disks; binaries : eclipsing; stars : individual (4U 1822-37); X-rays : binaries;

D O I：

10.1086/323343

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a preliminary analysis of the X-ray spectrum of the accretion disk corona source 4U 1822-37 obtained with the High-Energy Transmission Grating Spectrometer on board the Chandra X-Ray Observatory. We detect discrete emission lines from photoionized iron, silicon, magnesium, neon, and oxygen as well as a bright iron fluorescent line. Phase-resolved spectroscopy suggests that the recombination emission comes from an X-ray-illuminated bulge located at the predicted point of impact between the disk and the accretion stream. The fluorescent emission originates in an extended region on the disk that is illuminated by light scattered from the corona.

引用

页码：L101 / L104

页数：4

共 20 条

[1] Hydrodynamics of the stream-disk impact in interacting binaries [J].