Very high spatial resolution study of multiplicity in T Tauri systems

Velasco, S.
Referencia bibliográfica

Highlights of Spanish Astrophysics VIII, Proceedings of the XI Scientific Meeting of the Spanish Astronomical Society held on September 8-12, 2014, in Teruel, Spain, ISBN 978-84-606-8760-3. A. J. Cenarro, F. Figueras, C. Hernández-Monteagudo, J. Trujillo Bueno, and L. Valdivielso (eds.), p. 619-619

Fecha de publicación:
5
2015
Número de autores
1
Número de autores del IAC
1
Número de citas
1
Número de citas referidas
0
Descripción
We present first relevant results from our survey to search multiplicity in T Tauri systems and its relation with disk presence and planet formation on these young stars. This very high spatial resolution survey is being developed with Lucky Imaging techniques using the instruments FastCam and AOLI at the Observatorios de Canarias. Although still in an initial phase, we have already studied some systems, such as the one formed by the triplet LkHα 263, an edge-on disk and a close binary pair (0.4 arcsec), and LkHα 262, an M0 star with an unresolved companion. They have been long discussed to be bounded (Ducourant et al. 2005). Our new data, combined with previously available Adaptive Optics near infrared images (Jayawardhana et al. 2002) have leaded us to the following: a) there is orbital motion of the pair LkHα 263 AB and the component C is comoving with it. b) the likely existence of a close companion to LkHα 262. c) LkHα 262 and 263 are gravitationally bounded, thus, this system is one of the few quintuple pre-main sequence systems known till now. Besides the resolved edge-on thick disk around LkHα 263 C, the SEDs developed by us show the presence of disks around either 263 A, 263 B or both of them and also around 262. A deeper study of this particular system can be seen in Velasco et al. (2015).