Emission activity of the Be star 60 Cygni

IF 0.8 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Serbian Astronomical Journal Pub Date : 2017-09-26 DOI:10.2298/SAJ1794051S

Klára Šejnová, V. Votruba

引用次数: 0

Abstract

In this paper we present results of the spectroscopic analysis of H$\alpha$ line profile of the Be star 60 Cygni. We present time evolution of the equivalent width of the H$\alpha$ line profiles during years 1992 - 2016 and $V/R$ variation during years 1995 - 2016. We analyzed data from Ondřejov Observatory and from BeSS Database. The circumstellar disk of the star was present twice during years 1992 - 2016 and the second cycle shows stronger emission activity. We found out that the formation of the disk takes longer time than the disk extinction (extinction is much steeper than the formation) and that there is no evident period of changes in $V/R$ variation.

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Be星60 Cygni的发射活动

本文报道了天鹅座60 Be星H$\ α $谱线的光谱分析结果。我们给出了1992 - 2016年H$\alpha$线剖面等效宽度的时间演变，以及1995 - 2016年V/R$的变化。我们分析了来自Ondřejov Observatory和BeSS数据库的数据。这颗恒星的星周盘在1992年至2016年期间出现了两次，第二次周期显示出更强的辐射活动。我们发现盘的形成比盘的消光需要更长的时间(消光比形成陡峭得多)，并且$V/R$变化没有明显的周期变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Serbian Astronomical Journal ASTRONOMY & ASTROPHYSICS-

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

12 weeks

期刊介绍： Serbian Astronomical Journal publishes original observations and researches in all branches of astronomy. The journal publishes: Invited Reviews - review article on some up-to-date topic in astronomy, astrophysics and related fields (written upon invitation only), Original Scientific Papers - article in which are presented previously unpublished author''s own scientific results, Preliminary Reports - original scientific paper, but shorter in length and of preliminary nature, Professional Papers - articles offering experience useful for the improvement of professional practice i.e. article describing methods and techniques, software, presenting observational data, etc. In some cases the journal may publish other contributions, such as In Memoriam notes, Obituaries, Book Reviews, as well as Editorials, Addenda, Errata, Corrigenda, Retraction notes, etc.