The History Goes On: Century Long Study of Romano's Star dagger

0518346 - ASÚ 2020 RIV CH eng J - Článek v odborném periodiku
Maryeva, Olga - Viotti, R.F. - Koenigsberger, G. - Calabresi, M. - Rossi, C. - Gualandi, R.
The History Goes On: Century Long Study of Romano's Star dagger.
Galaxies. Roč. 7, č. 3 (2019), č. článku 79. E-ISSN 2075-4434
Grant CEP: GA ČR(CZ) Ga18-05665S
GRANT EU: European Commission(XE) 823734
Institucionální podpora: RVO:67985815
Klíčová slova: stars * evolution * winds
Obor OECD: Astronomy (including astrophysics,space science)
Způsob publikování: Open access

GR 290 (M 33 V0532 = Romano's Star) is a unique variable star in the M33 galaxy, which simultaneously displays variability typical for luminous blue variable (LBV) stars and physical parameters typical for nitrogen-rich Wolf-Rayet (WR) stars (WN). As of now, GR 290 is the first object which is confidently classified as a post-LBV star. In this paper, we outline the main results achieved from extensive photometric and spectroscopic observations of the star: the structure and chemical composition of its wind and its evolution over time, the systematic increase of the bolometric luminosity during the light maxima, the circumstellar environment. These results show that the current state of Romano's Star constitutes a fundamental link in the evolutionary path of very massive stars.
Trvalý link: http://hdl.handle.net/11104/0303505