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Spectroscopy of Blue Stars with Hα Emission in M33

Published online by Cambridge University Press:  25 May 2016

O. Sholukhova
O. Sholukhova*
Affiliation:
Special Astrophysical Observatory, Russia

Abstract

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Results of follow-up multi-object spectroscopy of 173 blue stars with Hα emission in the galaxy M33, carried out on the 6-m telescope, are presented. The stars have been originally selected as candidates for LBV and SS 433-type stars. The spectra have been obtained in the region of Hα. All the objects have fallen into two groups – stars with probable intrinsic Hα emission and stars where this emission may belong to H II regions. A number of criteria have been used at the selection, the principal one being the width of Hα emission. 57 stars in whose spectra the Hα line was broad have been selected. Spectra of the most interesting stars are presented. On the basis of luminosity and spectral type, stars were selected which may be considered as hypergiants or LBV candidates (3 of them – N41, N512, N517 are the most reliable). Two stars (v532, N35) have spectra similar to MCA1-B (Ofpe/WN9). The object I 322 is discussed as a candidate for an SS 433-type star.

Type
Part 2: The Database
Information
Symposium - International Astronomical Union , Volume 192: The Stellar Content of Local Group Galaxies , 1999 , pp. 280 - 283
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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