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A Day and Night on HW Vir

Published online by Cambridge University Press:  25 February 2014

M. Vučković ,
R.H. Østensen  and
S. Bloemen
M. Vučković
Affiliation:
European Southern Observatory, Alonso de Córdova 3107, Santiago, Chile
R.H. Østensen
Affiliation:
Institute for Astronomy, K.U. Leuven, Celstijnenlaan 200D, 3001 Leuven, Belgium
S. Bloemen
Affiliation:
Department of Astrophysics, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
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Abstract

We present a preliminary analysis of time-resolved X-shooter spectroscopy of HW Vir, a post-common envelope binary system, comprising of hot subdwarf B primary and a cool M dwarf secondary. Aiming at detecting and analysing the irradiated light of the superheated hemisphere of the M dwarf, we demonstrate that HW Vir is a bona fide double lined system allowing us to directly derive the masses of both stars and consequently backtrack the controversial evolution of subdwarf B stars and test the mass-radius relation of low mass stars.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 64: Setting a New Standard in the Analysis of Binary Stars , 2013 , pp. 431 - 432
Copyright
© EAS, EDP Sciences, 2014

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References

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