680 Article(s)
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© 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We report the discovery of an unusual stellar system SMSS J130522.47-293113.0. The optical spectrum is dominated by a blue continuum together with...
The element abundance ratios of four low-mass stars with extremely low metallicities (abundances of elements heavier than helium) indicate that the gas out of which the stars formed was enriched in each case by at most a few—and potentially only one—...
20 pages, 26 figures
International audience
19 pages, submitted to Astronomy and Astrophysics
10 pages, 7 figures, accepted for publication in A&A
Context: A number of microlensing dark-matter surveys have produced tens of millions of light curves of individual background stars. These data provide an unprecedented opportunity for systematic studies of whole classes of variable stars and their h...
The OGLE-II event sc5_2859 was previously identified as the third longest microlensing event ever observed. Additional photometric observations from the EROS (Experience de Recherche d'Objets Sombres) survey and spectroscopic observations of the cand...
submitted to A&A - The EROS-2 Collaboration
20 pages, 13 figures