Search for LBV Candidates in the M33 Galaxy

Abstract

A total of 185 luminous blue variable (LBV) candidates with V < 18.5 and B-V < 0.35 are selected based on the photometrical Survey of Local Group Galaxies made by P. Massey et al. 2006. The candidates were selected using aperture photometry of H-alpha images. The primary selection criterion is that the prospective candidate should be a blue star with H-aplha emission. In order not to miss appreciably reddened LBV candidates, we compose an additional list of 25 presumably reddened (0.35 < B-V < 1.2, V < 18.5) emission star candidates. A comparison with the list of known variables in the M33 galaxy showed 29% of our selected candidates to be photometrically variable. We also find our list to agree well with the lists of emission-line objects obtained in earlier papers using different methods.

6 figures

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Cited by in corpus (9)

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• Luminous and Variable Stars in M31 and M33. III. The Yellow and Red Supergiants and Post-Red Supergiant Evolution
• Luminous and Variable Stars in M31 and M33 V. The Upper HR Diagram
• New Luminous Blue Variable Candidates in NGC 4736
• New luminous blue variable candidates in the NGC 247 galaxy
• Multi-Epoch BVRI Photometry of Luminous Stars in M31 and M33
• Two New LBV Candidates in the M33 Galaxy
• How long can LBVs sleep? A long-term photometric vaiability and spectral study of the Galactic candidate luminous blue variable MN112