| Issue |
EAS Publications Series
Volume 64, 2013
Setting a New Standard in the Analysis of Binary Stars
|
|
|---|---|---|
| Page(s) | 425 - 426 | |
| Section | Posters | |
| DOI | https://doi.org/10.1051/eas/1364077 | |
| Published online | 25 February 2014 | |
Setting a New Standard in the Analysis of Binary Stars
K. Pavlovski, A. Tkachenko and G. Torres (eds)
EAS Publications Series, 64 (2013) 425–426
K. Pavlovski, A. Tkachenko and G. Torres (eds)
EAS Publications Series, 64 (2013) 425–426
PG1544+488: first of its kind – a system containing helium-rich subdwarf twins
Armagh Observatory, College Hill, BT61 9DG, Armagh, Northern Ireland, UK
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.
© EAS, EDP Sciences, 2014