X-RAY DISCOVERY OF A HOT PG-1159 STAR, RX-J0122.9-7521

被引：10

作者：

COWLEY, AP ^{[1
]}

SCHMIDTKE, PC ^{[1
]}

HUTCHINGS, JB ^{[1
]}

CRAMPTON, D ^{[1
]}

机构：

[1] NATL RES COUNCIL CANADA,DOMINION ASTROPHYS OBSERV,VICTORIA,BC V8X 4M6,CANADA

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 1995年 / 107卷 / 716期

关键词：

D O I：

10.1086/133640

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The supersoft X-ray source RX J0122.9-7521 has been optically identified with an extremely hot PG 1159 star, Its spectrum shows high-excitation emission lines from which we estimate T(eff)similar to 140,000 K and log g similar to 7. Limited photometry taken during six nights shows no conclusive variability, but we cannot rule out short-period, low-amplitude pulsations (P<5 min) as are found in some PG 1159 stars. There is some evidence for variations in the emission-line strengths, but higher-quality spectra are needed to confirm this.

引用

页码：927 / 930

页数：4

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