文章基本信息

标题：Aquarii is another Cassiopeiae objec
本地全文：下载
作者：Yaël Nazé ; Yaël Nazé ; Gregor Rauw 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2017
卷号：602
页码：1-5
DOI：10.1051/0004-6361/201731135
语种：English
出版社：EDP Sciences
摘要：The γ Cas category is a subgroup of Be stars displaying a strong, hard, and variable thermal X-ray emission. An XMM-Newton observation of π Aqr reveals spectral and temporal characteristics that clearly make this Be star another member of the γ Cas category. Furthermore, π Aqr is a binary but, contrary to γ Cas, the nature of the companion to the Be star is known; it is a non-degenerate (stellar) object and its small separation from the Be star does not leave much room for a putative compact object close to the Be disk. This renders the accretion scenario difficult to apply in this system, and, hence, this discovery favors a disk-related origin for the γ Cas phenomenon.
关键词：enstars: early-typestars: emission-line, BeX-rays: starsstars: individual:πAqr