On the magnetic accretor GK Persei in outburst

被引：21

作者：

Hellier, C ^{[1
]}

Harmer, S ^{[1
]}

Beardmore, AP ^{[1
]}

机构：

[1] Univ Keele, Sch Chem & Phys, Keele ST5 5BG, Staffs, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2004年 / 349卷 / 02期

关键词：

accretion; accretion discs; binaries : close; stars : dwarf novae; stars : individual : GK Per; novae; cataclysmic variables; X-rays : stars;

D O I：

10.1111/j.1365-2966.2004.07539.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

RXTE made five X-ray observations of the magnetic accretor GK Per during its 1996 outburst, recording a count rate of 10 times the quiescent level. The 351-s spin pulse shows a deep, nearly sinusoidal modulation, in contrast to the weaker, double-humped profile of quiescence. The spectrum shows absorption increased by two orders of magnitude over quiescence. We explain these differences in terms of the changing accretion geometry as the outbursting disc forces the magnetosphere inwards, and discuss the 5000-s X-ray quasi-periodic oscillations seen during the outbursts of GK Per.

引用

页码：710 / 714

页数：5

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