Membership status of TWA22AB

Using the ESO NTT/SUSI2 telescope, we observed TWA22AB during five different observing runs over 1.2 years to measure its trigonometric parallax and proper motion. HARPS at the ESO 3.6m telescope was also used to measure the system's radial velocity over 2 years. Based on trigonometric-parallax, proper-motion and radial-velocity measurements, we re-analyzed the membership of TWA22AB of the young, nearby associations TW Hydrae, β Pictoris and Tucana–Horologium.

Mots clés

stars: distances open clusters and associations: general stars: individual (TWA22AB) binaries: general

Domaines

Astrophysique stellaire et solaire [astro-ph.SR] Astrophysique stellaire et solaire [astro-ph.SR]

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https://hal.science/hal-00460490

Soumis le : lundi 1 mars 2010-13:40:16

Dernière modification le : jeudi 11 juillet 2024-15:43:43

Dates et versions

hal-00460490 , version 1 (01-03-2010)

Identifiants

HAL Id : hal-00460490 , version 1
BIBCODE : 2010IAUS..266..540T
DOI : 10.1017/S1743921309992006

Citer

Ramachrisna Teixeira, C. Ducourant, Gael Chauvin, A. Krone-Martins, Mickael Bonnefoy, et al.. Membership status of TWA22AB. Proceedings of the International Astronomical Union - Rio de janeiro : Brésil (2009), Star clusters: basic galactic building blocks throughout time and space, IAU Symposium, Volume 266, p. 540-543 - 2010IAUS.266.540T, 2010, Rio de janeiro, Brazil. pp.540-543, ⟨10.1017/S1743921309992006⟩. ⟨hal-00460490⟩

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