Le 26 avril 2013
À 10h30
Salle de Cours – Grande Coupole
Bertrand GOLDMAN
MPIA Heidelberg, Allemagne
From Haleakala in Hawaii, the PanSTARRS1 project routinely observes all the sky North of -30 declination in five optical bands, several times a year. This unique survey combines depth, image quality, wide sky coverage to yield exquisite photometric and astrometric precision, and unprecedented resolution in the time domain. This ground-based precursor of GAIA (in some aspects) and LSST takes the research of the Solar neighbourhood onto a new level. It is particularly well suited for the study of the field ultra cool dwarfs of the Solar neighbourhood, as well as the extended, low-density nearby structures. In this talk, I’ll describe the PanSTARRS1 project, and then concentrate on our study of the Hyades cluster. The Hyades cluster has been the target of many studies in the past, being the nearest intermediate-age cluster. Its proximity enables a detailed analysis of its morphology and a complete characterisation of its members down to low masses. But until now the data was missing to study the low-mass end out to large cluster radii. At the other end of the mass spectrum, we use the multi-band photometry to search for new white dwarf members. I’ll also discuss briefly our search for nearby brown dwarfs, in particular cross-matching with external catalogues such as 2MASS and WISE.