Name: Carlos A. O. Torres

Institution: Laboratario Nacional de Astrofisica/MCT

e-mail: beto(no-spam)lna.br

Partner Contry: BRA

Science Meeting: Yes

User Meeting: Yes

NGO Staff Meeting: No

Presentation: Yes

Format: Poster

Title: Search for Sub-stellar Companions Around SACY Associations.

Co-author: Carlos Alberto O. Torres Nuria Huelamo Herve Bouy Claudio H. F. Melo

Co-authors' Institutions: LAEFF-INTA UC Berkeley ESO

Abstract:

We present diffraction-limited infrared images of young stars in newly discovered nearby associations from the SACY survey. The main goal of the project is to detect substelar companions around them. Since the targets are young, low-mass stars, the contrast between the stars and the companions is reduced. Being nearby we can probe small separations. Besides the substellar companion search, the sample will allow us to study the binary frequency in each association, its evolution with age and, finally, to derive the dynamical mass of sub-stellar objects (low mass brown dwarfs and massive planets). The program has begun in 2006 with the observation of 78 targets with NACO at the VLT. In order to continue, we have submitted new proposals for NACO VLT and NIRI ALTAIR at the GEMINI North. In this poster we present preliminary results for the 78 targets observed in 2006.

Comments:

To be send in few days