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Abstract: We combine archival spectral observations of the LBV star V532 Romano-sstar together with the existing photometric data in the B band. Spectroscopicdata cover 15 years of observations from 1992 to 2007. We show that theobject in maximum of brightness behaves as an emission line supergiant while inminimum V532 moves along the sequence of late WN stars. In this sense, theobject behaves similarly to the well-known Luminous Blue Variable LBV starsAG Car and R127, but is somewhat hotter in the minima. We identify about 100spectral lines in the 3700

7300 Angstrom wavelength range. For today, ourspectroscopy is the most comprehensive for this object. The velocity of thewind is derived using HeI triplet lines 360+-30 km-s. Physical parameters ofthe nebula around V532 are estimated.



Author: O. Maryeva, P. Abolmasov

Source: https://arxiv.org/







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