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An X-ray study of mass-loss rate and wind acceleration of massive stars

Published online by Cambridge University Press:  05 September 2012

Yoshitomo Maeda  and
Yasuharu Sugawara
Yoshitomo Maeda
Affiliation:
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510 email: ymaeda@astro.isas.jaxa.jp
Yasuharu Sugawara
Affiliation:
Department of Physics, Faculty of Science & Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo, Tokyo 112-8551 email: sugawara@phys.chuo-u.ac.jp
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Abstract

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By monitoring WC7 and the O5.5 binary WR 140 with the Suzaku telescope, we demonstrate a new method to measure the mass loss rates of both stars. By using the absorption column density, we found a mass-loss rate for the WC7 component: ṀWC7 ≈ 1.2 × 10−5 M⊙ yr−1. We also measured the mass-loss rate of the companion O component using a luminosity variation in phases: ṀO5.5 ≈ 5 × 10−7 M⊙ yr−1.

Keywords

Massive starGRB progenitormass-loss rate
Type
Poster Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S279: Death of Massive Stars: Supernovae and Gamma-Ray Bursts , April 2011 , pp. 351 - 352
Copyright
Copyright © International Astronomical Union 2012

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