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PG1544+488: first of its kind – a system containing helium-rich subdwarf twins

Published online by Cambridge University Press:  25 February 2014

H.T. Şener  and
C.S. Jeffery
H.T. Şener
Affiliation:
Armagh Observatory, College Hill, BT61 9DG, Armagh, Northern Ireland, UK
C.S. Jeffery
Affiliation:
Armagh Observatory, College Hill, BT61 9DG, Armagh, Northern Ireland, UK
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Abstract

PG1544+488 is a short-period spectroscopic binary containing two subdwarf B stars and is exceptional because the surfaces of both components are extremely helium-rich. We present a new spectroscopic analysis to obtain improved orbital parameters, including the period P = 0.496 ± 0.002 day, mass ratio q = 0.933 ± 0.016, and the atmospheric parameters of each component.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 64: Setting a New Standard in the Analysis of Binary Stars , 2013 , pp. 425 - 426
Copyright
© EAS, EDP Sciences, 2014

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References

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