Poster Abstracts

Name/Affiliation:  V. J. S. Béjar, A. Pérez-Garrido, N. Lodieu, B. Gauza, R. Rebolo, H. Harrison, R. McMahon on behal (Instituto de Astrofísica de Canarias)

Title:  Ultra-Cool dwarfs in the VISTA Hemisphere Survey

The VISTA Hemisphere Survey (VHS) is a near-IR public survey that will cover the entire Southern sky in the JKs filters over the next years, to a depth 3-4 mag fainter than 2MASS/DENIS. To date, VHS collected data of about 8000 deg^2, and this area will increase in the following years, providing large enough area to study a large variety of scientific goals. The VHS Ultra-Cool Dwarf group aims at completing the census of the coolest members of the solar vicinity, elaborating a new catalog of high proper motion stars, identifying benchmark companions of nearby stars, extremely wide low-mass binaries (physical separations of tens of thousands of AU), and companions of metal poor stars. In this talk, we present recent results of our searches including the identification of a new L dwarf member of the moderately metal poor triple system HD 221356, several wide M, L and T companions of nearby field dwarfs, and a new T companion to a planet host star.