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A CCD spectroscopic orbit and line-variability near periastron for HD 193793

Published online by Cambridge University Press:  07 August 2017

Yannick Hervieux
Yannick Hervieux*
Affiliation:
Département de Physique, Université de Montréal, C.P. 6128, Succ. A, Montréal, QC, H3C 3J7, and Observatoire du mont Mégantic, Canada

Abstract

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Since 1987 we have been observing long-period WR binaries about once every two months with the 1.6m telescope at Observatoire du mont Mégantic. The spectra cover the range λλ ∼ 4000—6000Â with 2-pixel resolution (∼2.5Â) and S/N ∼ 500 in the strongest line-peaks. We present a new orbit obtained from several lines in the WC7 and the O4—5 components of the binary system HD 193793 (WR140) and discuss emission-line variability especially in the 2—3 month interval around periastron.

Type
Session VII - Hydrodynamics and high-energy physics of colliding winds
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995 , pp. 460 - 463
Copyright
Copyright © Kluwer 1995 

References

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