M
M. Billères
Researcher at European Southern Observatory
Publications - 13
Citations - 728
M. Billères is an academic researcher from European Southern Observatory. The author has contributed to research in topics: Stars & Subdwarf. The author has an hindex of 11, co-authored 13 publications receiving 708 citations.
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Journal ArticleDOI
A Driving Mechanism for the Newly Discovered Long-Period Pulsating Subdwarf B Stars
Gilles Fontaine,Pierre Brassard,Stéphane Charpinet,Elizabeth M. Green,Pierre Chayer,M. Billères,Suzanna K. Randall +6 more
TL;DR: In this article, the authors present the results of a stability survey carried out for a sequence of representative models of subdwarf B stars spanning the range of effective temperature 22; 000 KTeff � 38;000 K.
Journal ArticleDOI
Discovery and Asteroseismological Analysis of the Pulsating sdB Star PG 0014+067*
TL;DR: In this paper, the authors reported the discovery of low-amplitude, short-period, multi-periodic luminosity variations in the hot B subdwarf PG 0014+067, which was selected as a potential target in the ongoing survey to search for pulsators of the EC 14026 type.
Journal ArticleDOI
On the purity of the zz ceti instability strip: discovery of more pulsating da white dwarfs on the basis of optical spectroscopy
TL;DR: In this article, two new ZZ Ceti pulsators, LP 133-144 and HE 1258+0123, were selected on the basis of model atmosphere fits to optical spectroscopic data.
Journal ArticleDOI
The first wide ultracool binary dwarf in the field: DENIS-J055146.0-443412.2 (M8.5 + L0)
TL;DR: Denis-J055146.0-443412.2 is an M8.5 + L0 pair, with a physical separation of over 200 AU as discussed by the authors.
Journal ArticleDOI
Structural parameters of the hot pulsating B subdwarf Feige 48 from asteroseismology
Stéphane Charpinet,Gilles Fontaine,Pierre Brassard,M. Billères,Elizabeth M. Green,Pierre Chayer,Pierre Chayer +6 more
TL;DR: In this paper, the authors presented a detailed analysis of the rapidly pulsating subdwarf B star Feige 48 using the well-known forward method, leading to the identification of the (k, l) indices of the four independent periods identified in the star, and to the determination of its structural parameters.