Z-URSA-MINORIS - A NEW R-CORONAE-BOREALIS VARIABLE

被引：16

作者：

BENSON, PJ

CLAYTON, GC

GARNAVICH, P

SZKODY, P

机构：

[1] UNIV COLORADO,CASA,BOULDER,CO 80309

[2] DOMINION ASTROPHYS OBSERV,VICTORIA V8X 4M6,BC,CANADA

[3] UNIV WASHINGTON,SEATTLE,WA 98195

来源：

ASTRONOMICAL JOURNAL | 1994年 / 108卷 / 01期

关键词：

D O I：

10.1086/117063

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have monitored Z Ursa Minoris using a V filter beginning 1992 April. It suddenly dimmed by almost 6 mag in late summer 1993. We obtained a spectrum 1993 November 20.54 UT which confirms that Z UMi is probably an R Coronae Borealis (RCB) star. The spectrum of Z UMi shows the strong carbon bands and weak hydrogen lines of an RCB star. It also shows the typical late decline emission in the Na I D lines. The light curve shows evidence for stellar pulsations as well as the large and rapid fading which characterizes the RCB stars.

引用

页码：247 / 250

页数：4

共 24 条

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