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Astron. Astrophys. 349, 796-800 (1999)

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Photometric variability of LBV-candidate stars and Hubble-Sandage variables A, B, C and 2 in M 33

R.G. Kurtev 1, L.J. Corral 2 and L. Georgiev 3

1 Department of Astronomy, Sofia University, 5 James Bourchier str., BG-1126 Sofia, Bulgaria (kurtev@phys.uni-sofia.bg)
2 Instituto de Astrofísica de Canarias, c/Vía Lactea s/n, E-38200 La Laguna, España (lcorral@iac.es)
3 Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. Postal 70-264, 04510 México, D.F., México (georgiev@astroscu.unam.mx)

Received 18 August 1998 / Accepted 9 July 1999


We present the photometric history of some Luminous Blue Variable candidate stars in M 33. The search for outbursts was made in photographic plates taken in the B band of the galaxy M 33 and cover an eight year period, 1982-1990. Twenty five plates, separated into seven groups, have been used. CCD UBV magnitudes of the star UIT003 are presented also. Only one (of 12) of the LBV candidates (UIT003) presents clear variability above the noise. The combination of photometric variability and a typical LBV spectrum make it a new LBV.

We present also the light curves of Hubble-Sandage Variables A, B, C and 2.

Key words: stars: early-type – stars: variables: general – galaxies: individual: M 33

Send offprint requests to: L.J Corral

© European Southern Observatory (ESO) 1999

Online publication: September 13, 1999