The parsec program: a large sample of brown dwarf trigonometric parallaxes

The parsec program: a large sample of brown dwarf trigonometric parallaxes

We report on the parsec program, which observed 140 L and T dwarfs on a regular basis from 2007 to 2011, using the WIFI camera on the ESO/2.2 m telescope. Trigonometric parallaxes at 5 mas precision are derived for 49 objects, and mas yr−1-level proper motions are derived for approximately 200,000 o...

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Veröffentlicht in:Proceedings of the International Astronomical Union 2012-08, Vol.8 (S289), p.48-51
Hauptverfasser: Andrei, Alexandre H., Smart, Richard L., Bucciarelli, Beatrice, Penna, Jucira L., Marocco, Federico, Lattanzi, Mario G., Crosta, Mariateresa, Teixeira, Ramakrishna
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Contributed Papers
Dwarf stars
Trigonometry
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container_end_page 51
container_issue S289
container_start_page 48
container_title Proceedings of the International Astronomical Union
container_volume 8
creator Andrei, Alexandre H.
Smart, Richard L.
Bucciarelli, Beatrice
Penna, Jucira L.
Marocco, Federico
Lattanzi, Mario G.
Crosta, Mariateresa
Teixeira, Ramakrishna
description We report on the parsec program, which observed 140 L and T dwarfs on a regular basis from 2007 to 2011, using the WIFI camera on the ESO/2.2 m telescope. Trigonometric parallaxes at 5 mas precision are derived for 49 objects, and mas yr−1-level proper motions are derived for approximately 200,000 objects in the same fields. We discuss image cleaning, object centroiding, and astrometric methods, in particular three different approaches for trigonometric parallax determination.
doi_str_mv 10.1017/S1743921312021096
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source Cambridge University Press Journals Complete
subjects Contributed Papers
Dwarf stars
Trigonometry
title The parsec program: a large sample of brown dwarf trigonometric parallaxes
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