The History Goes On: Century Long Study of Romano’s StarGalaxiesстатья
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Дата последнего поиска статьи во внешних источниках: 20 ноября 2019 г.
Аннотация: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.