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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
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.
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- Research Article
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- © EAS, EDP Sciences, 2014