Hubble Space Telescope observations of the black hole X-ray transient GRO J0422+32 near quiescence

被引：10

作者：

Hynes, RI ^{[1
]}

Haswell, CA ^{[1
]}

机构：

[1] Univ Sussex, Ctr Astron, Brighton BN1 9QJ, E Sussex, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1999年 / 303卷 / 01期

关键词：

accretion; accretion discs; binaries : close; stars : individual : GRO 0422+32; ultraviolet : stars;

D O I：

10.1046/j.1365-8711.1999.02227.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present HST/FOS ultraviolet and optical spectroscopy of the black hole X-ray transient GRO J0422+32 shortly before the system reached quiescence. We find that the accretion spectrum from 2500 to 9000 Angstrom can be very well fitted by a self-absorbed synchrotron model, with superposed HI and MgII emission lines. The explanations that we suggest for this spectrum are either that it is due to active coronal regions above a geometrically thin accretion disc, or that the disc is evaporated into an advective flow.

引用

页码：101 / 106

页数：6

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