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Observations of southern Wolf-Rayet stars

I: The spectroscopic binary HD 90657

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Abstract

The Wolf-Rayet star HD 90657 is found to be a spectroscopic binary with a WN5+O6 spectrum and a period of 6.456 days. Preliminary orbital elements show an elliptic orbit and a mass ratioM WR/M o∼0.5. Evidence is presented for the Wolf-Rayet atmosphere being accelerated outwards and not being spherically symmetric.

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Authors and Affiliations

  1. Instituto de Astronomía y Física del Espacio, Buenos Aires, Argentina

    Virpi S. Niemela (Visiting Astronomer, Cerro Tololo Inter-American Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under contract with the National Science Foundation; and a Member of the Carrera del Investigador Científico del CONICET, Argentina)

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  1. Virpi S. Niemela
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Operated under an agreement between the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), the Universidad de Buenos Aires and the Comisión Nacional de Estudios Geoheliofísicos.

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Niemela, V.S. Observations of southern Wolf-Rayet stars. Astrophys Space Sci 45, 191–197 (1976). https://doi.org/10.1007/BF00642154

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  • DOI: https://doi.org/10.1007/BF00642154

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