Spectral activity episode of the Be-shell star Pleione in 2013-2018

0570194 - ASÚ 2024 RIV BG eng J - Článek v odborném periodiku
Iliev, L. - Kubát, Jiří - Kubátová, Brankica - Dankova, L.
Spectral activity episode of the Be-shell star Pleione in 2013-2018.
Bulgarian astronomical journal. Roč. 39, č. 1 (2023), s. 1-9. ISSN 1313-2709
Institucionální podpora: RVO:67985815
Klíčová slova: emission * shell stars * variable stars
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 0.4, rok: 2022
Způsob publikování: Omezený přístup
https://www.astro.bas.bg/AIJ/issues/n39/LIliev.pdf

Pleione is well known as a prototype of a group of similar Be-stars, among the vast diversity of active B type stars. Its transitions between cyclic decades-long periods of having a spectrum with intense emission lines or a spectrum with sharp absorption lines is traced already for more than a century. In the present study we report an episode of Ha emission activity in the spectrum of the Be-shell star Pleione in 2016. It was documented with high resolution spectral observations carried out at VLT (ESO). The outburst of H alpha emission was superimposed onto a gradual spectral changes during the development of a shell spectral phase of Pleione. The H alpha outburst was accompanied by synchronized activity in the H beta line.
Trvalý link: https://hdl.handle.net/11104/0341981