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Wolf-Rayet binaries: old friends and new acquaintances

Published online by Cambridge University Press:  25 May 2016

Virpi S. Niemela ,
Roberto Gamen ,
Nidia I. Morrell  and
Sixto Giménez Benítez
Virpi S. Niemela
Affiliation:
Facultad de Ciencias Astronómicas y Geofísicas, U.N. La Plata, Paseo del bosque s/n, 1900 La Plata, Argentina
Roberto Gamen
Affiliation:
Facultad de Ciencias Astronómicas y Geofísicas, U.N. La Plata, Paseo del bosque s/n, 1900 La Plata, Argentina
Nidia I. Morrell
Affiliation:
Facultad de Ciencias Astronómicas y Geofísicas, U.N. La Plata, Paseo del bosque s/n, 1900 La Plata, Argentina
Sixto Giménez Benítez
Affiliation:
Facultad de Ciencias Astronómicas y Geofísicas, U.N. La Plata, Paseo del bosque s/n, 1900 La Plata, Argentina

Abstract

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Observations of WR stars in binary systems are discussed, emphasizing constraints on our knowledge of the binary frequency of WR stars, and of WR stars as a distinctive class of objects. Radial velocity orbits of newly discovered binaries, e.g., WR 29, a short period WN7+OB binary in our Galaxy, and SMC/AB 7, a massive WN+O7 binary in the Small Magellanic Cloud, are presented. New spectroscopic observations of binary systems with previously known orbits are also reported, showing in the case of WR 21 evidence of change of the orbital elements as derived from different spectral lines. An elliptic orbit for CV Ser is also illustrated.

Type
Part 1. Basic observational properties of Wolf-Rayet stars and other hot massive stars
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 26 - 37
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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