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L and T dwarfs in Gaia/SIM

Published online by Cambridge University Press:  01 October 2007

R. L. Smart ,
B. Bucciarelli ,
M. G. Lattanzi  and
H. R. A. Jones
R. L. Smart
Affiliation:
Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, Italy emails: smart/bucc/lattanzi@to.astro.it
B. Bucciarelli
Affiliation:
Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, Italy emails: smart/bucc/lattanzi@to.astro.it
M. G. Lattanzi
Affiliation:
Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, Italy emails: smart/bucc/lattanzi@to.astro.it
H. R. A. Jones
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire College Lane, Hatfield AL10 9AB, UK email: H.R.A.Jones@herts.ac.uk
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Abstract

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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.

Keywords

stars: low-massbrown dwarfsstars: distances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 429 - 432
Copyright
Copyright © International Astronomical Union 2008

References

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