EDP Sciences
Free Access
Issue
A&A
Volume 406, Number 3, August II 2003
Page(s) L51 - L54
Section Letters
DOI https://doi.org/10.1051/0004-6361:20030554
Published online 17 November 2003


A&A 406, L51-L54 (2003)
DOI: 10.1051/0004-6361:20030554

Letter

VLT/NACO adaptive optics imaging of the TY CrA system

A fourth stellar component candidate detected
G. Chauvin1, A.-M. Lagrange1, H. Beust1, T. Fusco2, D. Mouillet3, F. Lacombe4, P. Pujet5, G. Rousset2, E. Gendron4, J.-M. Conan2, D. Bauduin4, D. Rouan4, W. Brandner6, R. Lenzen6, N. Hubin7 and M. Hartung6

1  Laboratoire d'Astrophysique, Observatoire de Grenoble, 414 rue de la piscine, 38400 Saint-Martin d'Hères, France
2  ONERA, BP52, 29 avenue de la Division Leclerc, 92320 Châtillon Cedex, France
3  Laboratoire d'Astrophysique, Observatoire Midi-Pyrénées, 57 Av. d'Azereix, BP 826, 65008 Tarbes Cedex, France
4  Laboratoire D'Études Spatiales et d'Instrumentation en Astrophysique, Observatoire de Paris, Bat. 16, 5 Place J. Jansen, 92195 Meudon, France
5  Canada-France-Hawaii Telescope Corporation, PO Box 1597, Kamuela, HI96743, USA
6  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
7  ESO, Karl-Schwarzschild-Str. 2, 85748 Garching, Germany

(Received 17 February 2003 / Accepted 13 April 2003)

Abstract
We report the detection of a possible subsolar mass companion to the triple young system TY CrA using the NACO instrument at the VLT UT4 during its commissioning. Assuming for TY CrA a distance similar to that of the close binary system HD 176386, the photometric spectral type of this fourth stellar component candidate is consistent with an ~M 4 star. We discuss the dynamical stability of this possible quadruple system as well as the possible location of dusty particles inside or outside the system.


Key words: binaries: eclipsing -- stars: pre-main sequence -- stars: low-mass -- circumstellar matter

Offprint request: G. Chauvin, gchauvin@obs.ujf-grenoble.fr

SIMBAD Objects



© ESO 2003

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