Free Access
| Issue |
EAS Publications Series
Volume 82, 2019
Astro Fluid: An International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific Achievements
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|---|---|---|
| Page(s) | 107 - 118 | |
| Section | Tides in Stars and Planets | |
| DOI | https://doi.org/10.1051/eas/1982011 | |
| Published online | 21 June 2019 | |
Astro Fluid 2016
A.S. Brun, S. Mathis, C. Charbonnel and B. Dubrulle (eds)
EAS Publications Series, 82 (2019) 107-118
A.S. Brun, S. Mathis, C. Charbonnel and B. Dubrulle (eds)
EAS Publications Series, 82 (2019) 107-118
The formation of long-period eccentric binaries with a helium white dwarf companion
Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles (ULB), CP 226 – 1060 Bruxelles, Belgique
The recent discovery of long-period eccentric binaries hosting a He-white dwarf has been a challenge for binary-star modelling. Based on accurate determinations of the stellar and orbital parameters for IP Eri, a K0 + He-WD system, we propose an evolutionary path that is able to explain the observational properties of this system and, in particular, to account for its high eccentricity (0.25). Our scenario invokes an enhanced-wind mass loss on the first red giant branch in order to avoid mass transfer by Roche-lobe overflow, where tides systematically circularize the orbit.
© EAS, EDP Sciences, 2019