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Title:
L and T dwarfs in Gaia/SIM
Authors:
Smart, R. L.; Bucciarelli, B.; Lattanzi, M. G.; Jones, H. R. A.
Affiliation:
AA(Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, Italy ), AB(Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, Italy ), AC(Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, Italy ), AD(Centre for Astrophysics Research, University of Hertfordshire College Lane, Hatfield AL10 9AB, UK )
Publication:
A Giant Step: from Milli- to Micro-arcsecond Astrometry, Proceedings of the International Astronomical Union, IAU Symposium, Volume 248, p. 429-432
Publication Date:
07/2008
Origin:
CUP
Keywords:
stars: low-mass, brown dwarfs, stars: distances
DOI:
10.1017/S1743921308019753
Bibliographic Code:
2008IAUS..248..429S

Abstract

We discuss the role of distances for understanding brown dwarfs and estimate the contribution expected by Gaia. We show that Gaia will only observe 25% of L and T dwarfs within 50pc which, at a conservative estimate, amounts to less than 400 objects. We discuss how Gaia results will nevertheless aid the ground-based programs providing reliable, bias free constraints for the calculation of parallaxes in an absolute system. We list the current ground-based programs underway and the possibilities for future all sky survey programs.

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