FIRST DETECTION OF X-RAY VARIABILITY OF ETA-CARINAE

被引：49

作者：

CORCORAN, MF

RAWLEY, GL

SWANK, JH

PETRE, R

机构：

[1] UNIV SPACE RES ASSOC,WASHINGTON,DC

[2] APPL RES CORP,WASHINGTON,DC

来源：

ASTROPHYSICAL JOURNAL | 1995年 / 445卷 / 02期

关键词：

CIRCUMSTELLAR MATTER; STARS; ACTIVITY; INDIVIDUAL (ETA CARINAE); PECULIAR; X-RAYS;

D O I：

10.1086/187904

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recent ROSAT Position Sensitive Proportional Counter observations for the first time unequivocally reveal the presence of a compact source of hard X-ray emission centered on the peculiar star eta Car. These observations also show a dramatic change in the hard-band (E > 1.6 keV) counting rate by about a factor of 2 in a 4 month interval. Thus, strong variability, which is a characteristic of eta Car in radio through IR and visible-band wavelengths, is also observed at X-ray energies. The increase in hard X-ray emission could be the result of a tripling of the mass-loss rate in less than 4 months.

引用

页码：L121 / L124

页数：4

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