Parallax programs at sub-mas accuracy level"

G. Chauvin (1) , C. Ducourant (2, 3, 4, 5) , A. Krone-Martins (2, 3, 5) , J.-F. Le Campion (2, 3, 5) , R. Texeira (4)

1 LAOG - Laboratoire d'Astrophysique de Grenoble
2 L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux
3 OASU - Observatoire aquitain des sciences de l'univers
4 IAG - Instituto de Astronomia, Geofísica e Ciências Atmosféricas [São Paulo]
5 LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]

We present here the various parallax programs developed at Bordeaux Observatory. We show how the observing strategy, the methods of treatment and the global astrometric treatment allows us to reach sub-milliarcsecond parallaxes with observations performed with 4 meter-class telescopes. We present an ongoing program of distance determination to the TW Hydrae association.

Mots clés: astrometry

Domaines: Planétologie et astrophysique de la terre [astro-ph.EP]

G. Chauvin, C. Ducourant, A. Krone-Martins, J.-F. Le Campion, R. Texeira. Parallax programs at sub-mas accuracy level". Revista Mexicana de Astronomia y Astrofisica, 2008, 34, pp.29-34. ⟨hal-00398491⟩