Emission Activity of the Be star 60 Cygni

0480919 - ASÚ 2018 RIV RS eng J - Článek v odborném periodiku
Šejnová, K. - Votruba, Viktor
Emission Activity of the Be star 60 Cygni.
Serbian Astronomical Journal. Roč. 194, č. 1 (2017), s. 51-57. ISSN 1450-698X. E-ISSN 1820-9289
Grant CEP: GA MŠMT(CZ) LG15010
Institucionální podpora: RVO:67985815
Klíčová slova: stars * emission-line * Be stars
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 0.840, rok: 2017

In this paper we present results of spectroscopic analysis of the Ha 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 Ondrejov 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 (the extinction is much steeper than the formation) and that there is no evident period of changes in the V/R variation.
Trvalý link: http://hdl.handle.net/11104/0276594