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Parallaxes of L and T dwarfs

Published online by Cambridge University Press:  23 May 2005

R. L. Smart ,
C. A. L. Bailer-Jones  and
H. R. A. Jones
R. L. Smart
Affiliation:
Osservatorio Astronomico di Torino – INAF, Strada Osservatorio 20, Pino Torinese, TO 10025, Italy email: [email protected]
C. A. L. Bailer-Jones
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany email: [email protected]
H. R. A. Jones
Affiliation:
School of Physics Astronomy and Mathematics, University of Hertfordshire, College Lane, Hatfield AL10 9AB, UK email: [email protected]
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Abstract

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We discuss a new program to measure the parallaxes of a number of L and T dwarfs, objects that bridge the gap between M dwarfs and planets. This pilot project tests the feasibility of using large telescopes with infrared detectors to determine parallaxes at the level of milli-arcseconds (mas). First results show that we are able to achieve the required centroiding precision and simulations indicate that when the final observations come in we should be able to achieve our goal of parallaxes with accuracies of 2 mas. The main problems will be focal plane astrometric distortions and stability.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUC196 , June 2004 , pp. 420 - 426
Copyright
© 2004 International Astronomical Union