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
Format: Artikel
Sprache:eng
Schlagworte:
Contributed Papers
Dwarf stars
Trigonometry
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Zusammenfassung: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.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921312021096