• Media type: E-Article
  • Title: Membership status of TWA22AB
  • Contributor: Teixeira, Ramachrisna; Ducourant, Christine; Chauvin, Gael; Krone–Martins, Alberto G. O.; Bonnefoy, Mickael; Song, Inseok
  • Published: Cambridge University Press (CUP), 2009
  • Published in: Proceedings of the International Astronomical Union, 5 (2009) S266, Seite 540-543
  • Language: English
  • DOI: 10.1017/s1743921309992006
  • ISSN: 1743-9213; 1743-9221
  • Keywords: Astronomy and Astrophysics ; Space and Planetary Science
  • Origination:
  • Footnote:
  • Description: AbstractUsing 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.