Observations of southern Wolf-Rayet stars |
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Authors: | Virpi S. Niemela |
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Affiliation: | (1) Instituto de Astronomía y Física del Espacio, Buenos Aires, Argentina |
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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 ratioMWR/Mo0.5. Evidence is presented for the Wolf-Rayet atmosphere being accelerated outwards and not being spherically symmetric.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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