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Astron. Astrophys. 344, 101-104 (1999)


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The rotation speed of the companion star in V395 Car (=2S0921-630)

T. Shahbaz  *  1, E. Kuulkers 1, P.A. Charles 1, F. van der Hooft 2, J. Casares 3 and J. van Paradijs 2

1 Department of Astrophysics, Oxford University, Keble Road, Oxford, OX1 3RH, UK
2 Astronomical Institute "Anton Pannekoek", University of Amsterdam and Center for High Energy Astrophysics, Kruislaan 403, 1098 SJ, Amsterdam, The Netherlands
3 Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain

Received 17 November 1998 / Accepted 8 December 1998

Abstract

We have obtained high resolution optical spectroscopy of the accretion disc corona source 2S0921-630 (=V395 Car) that constrains the spectral type of the companion star to be most probably K0III . At 6500 Å the secondary star is found to contribute [FORMULA] 25% to the observed flux. The absorption line spectrum of the K0III companion star is broadened (compared to template stars) by a projected rotational velocity of 65[FORMULA]9 km s-1 (1-[FORMULA]).

Key words: stars: neutron – stars: individual: V395 Car – stars: fundamental parameters – stars: binaries: general

* Based on observations made at the European Southern Observatory, La Silla, Chile

Send offprint requests to: T. Shahbaz (tsh@astro.ox.ac.uk)

© European Southern Observatory (ESO) 1999

Online publication: March 10, 1999

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