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Numerical Simulation of the Surface Flow of a Companion Star in a Semi-Detached Binary System and its Application to Galactic Supersoft X-Ray Sources

Published online by Cambridge University Press:  22 February 2018

K. Oka ,
T. Matsuda ,
I. Hachisu  and
H. M. J. Boffin
K. Oka
Affiliation:
Department of Earth and Planetary Sciences, Kobe University, Kobe 657-8501, Japan (kazutaka@kobe-u.ac.jp)
T. Matsuda
Affiliation:
Department of Earth and Planetary Sciences, Kobe University, Kobe 657-8501, Japan (kazutaka@kobe-u.ac.jp)
I. Hachisu
Affiliation:
Department of Earth Science and Astronomy, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
H. M. J. Boffin
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching-bei-München, Germany

Extract

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We numerically simulate the surface flow of a gas-supplying companion star in a semi-detached binary system and construct the Doppler map. Our numerical results indicate an eddy configuration composed of a Heddy, a L1-eddy, and a L2-eddy associated with high/low pressures on the surface of the companion star. We find that the formation of these eddies can be explained in terms of the astrostrophic wind. We apply our calculations to the Galactic supersoft X-ray source RX J0019.8+2156. This object is very attractive for the present study since the observed Doppler map might reflect the surface flow on the companion star. We have constructed the Doppler map of RX J0019.8+2156 and compare it with observations.

Type
The Contributed Papers
Information
International Astronomical Union Colloquium , Volume 194: Compact binaries in the galaxy and beyond , 2004 , pp. 260
Copyright
Copyright © Instituto de astronomia/revista mexicana de astronomίa y astrofίsica 2004

References

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