首页   按字顺浏览 期刊浏览 卷期浏览 The corona of the K5 giant &ggr; Dra, and its relation to the hybrid‐chromospher...
The corona of the K5 giant &ggr; Dra, and its relation to the hybrid‐chromosphere stars

 

作者: Alexander Brown,   Jeffrey L. Linsky,   Thomas R. Ayres,  

 

期刊: AIP Conference Proceedings  (AIP Available online 1994)
卷期: Volume 313, issue 1  

页码: 36-40

 

ISSN:0094-243X

 

年代: 1994

 

DOI:10.1063/1.46691

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Gamma Draconis is the first, normal, single late K giant located on the red side of the coronal ‘‘dividing line’’ known to show conclusive evidence for hot (∼105K) transition region (TR) and coronal plasma. We present ROSAT PSPC data and HST GHRS spectra of &ggr; Dra and describe the coronal and TR properties of this K5 III star. The high temperature emissions of &ggr; Dra are compared to those of a sample of hybrid‐chromosphere bright giants and supergiants. New PSPC detections of the K3 giant &agr; Hya and the G supergiant &bgr; Aqr are presented. Upper limits are found for the hybrid‐chromosphere stars &thgr; Her and &agr; Aqr. These new measurements extend the X‐ray to C IV flux‐flux relations to significantly lower activity levels.

 

点击下载:  PDF (326KB)



返 回