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

Abstract

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.

arXiv comment24 pages, 8 figures, 6 tables

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Cited by in corpus (6)

• A new and unusual LBV-like outburst from a Wolf-Rayet star in the outskirts of M33
• Unveiling the nitrogen-rich massive star in the metal-poor galaxy NGC 4068
• Luminous Blue Variables
• How long can LBVs sleep? A long-term photometric vaiability and spectral study of the Galactic candidate luminous blue variable MN112
• Asymmetrical nebula of the M33 variable GR290 (WR/LBV)
• On the spatial distribution of luminous blue variables in the M33 galaxy