Parallaxes of ultra cool brown dwarf calibrators.

R., Teixeira C. Ducourant 1 A., Krone-Martins S., Scarano A., Moitinho 2 Ph., Galli
1 M2A 2014
L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux, OASU - Observatoire aquitain des sciences de l'univers, LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], Université Sciences et Technologies - Bordeaux 1
Abstract : Brown dwarfs are extremely important objects for our understanding of stellar and planetary formation and evolution. Lying at the limit of the coolest stars, they are poorly understood and the atmospheric models of are not yet reliable. Beyond this population, very cool brown dwarfs (Teff˜300 K) were recently discovered constituting new spectral classes. A precise distance is the fundamental parameter to be able to correctly derive their masses, ages and thus calibrate the atmospheric models of this type of object. In 2012 we started an observational program to measure the trigonometric parallax of 5 such extreme objects recently detected prototypes of cool brown dwarfs. Observations started at the 4.1m SOAR/Spartan telescope and will continue until the end of 2014. Here we present an overview on the development of this project.
Type de document :
Article dans une revue
Memorie della Societa astronomica italiana, 2014, 85, pp.793
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Contributeur : Marie-Paule Pomies <>
Soumis le : mercredi 20 mai 2015 - 15:13:10
Dernière modification le : vendredi 19 juin 2015 - 01:04:09




R., Teixeira, C. Ducourant, A., Krone-Martins, S., Scarano, A., Moitinho, et al.. Parallaxes of ultra cool brown dwarf calibrators.. Memorie della Societa astronomica italiana, 2014, 85, pp.793. <hal-01153848>



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