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Be Binaries with Warm Dust and Exotic High-Luminosity A–F Emission-Line Stars

Published online by Cambridge University Press:  12 April 2016

Anatoly S. Miroshnichenko ,
Karen S. Bjorkman ,
Valentina G. Klochkova  and
Eugene L. Chentsov
Anatoly S. Miroshnichenko
Affiliation:
Ritter Observatory, Dept. of Physics & Astronomy, University of Toledo, Toledo, OH 43606, USA
Karen S. Bjorkman
Affiliation:
Ritter Observatory, Dept. of Physics & Astronomy, University of Toledo, Toledo, OH 43606, USA
Valentina G. Klochkova
Affiliation:
Special Astrophysical Observatory of the Russian Academy of Sciences, Karachai-Chircassian Republic, Nizhnij Arkhyz, 369167, Russia
Eugene L. Chentsov
Affiliation:
Special Astrophysical Observatory of the Russian Academy of Sciences, Karachai-Chircassian Republic, Nizhnij Arkhyz, 369167, Russia

Abstract

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We present the results of photometric and high-resolution spectroscopic studies of a group of B[e] stars (Be stars with warm dust or B[e]Ds) and of two cooler objects with extremely high luminosities (HDE 331319 and IRC+10420). The B[e]Ds is a growing group of objects with very strong emission-line spectra, some of which show direct evidence of the presence of a hot and a cool star in the system. Their basic properties and connection to other groups of binaries are discussed, and a new list of members is presented. Fundamental parameters and chemical composition of an unusual F-supergiant HDE 331319 and recent results on a fast evolving object IRC+10420 are also reported.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 187: Exotic Stars as Challenges to Evolution , 2002 , pp. 303 - 308
Copyright
Copyright © Astronomical Society of the Pacific 2002

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