Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 2K010

Multiplicity study of young pre-main sequence stars in the Lupus star-forming Region

Vogt, Nikolaus (Departamento de Fisica y Astronomia, Universidad de Valparaiso, Chile)
Mugrauer, Markus (Astrophysical Institute and University Observatory Jena, Germany)
Schmidt, Tobias O. B. (Astrophysical Institute and University Observatory Jena, Germany)
Neuhaeuser, Ralph (Astrophysical Institute and University Observatory Jena, Germany)
Ginski , Christian (Astrophysical Institute and University Observatory Jena, Germany)

Abstract:
We have conducted a high contrast imaging search for (sub)stellar companions among 63 young pre-main sequence stars in the Lupus star forming region, using the adaptive optics imager NACO at UT4 of the ESO Paranal observatory. We detected faint co-moving companions around our targets at angular separations between about 0.1 up to several arc seconds (binaries and triple systems). Some of these companions are in the sub stellar mass regime, according to their apparent near infrared photometry at the distance of the Lupus star forming region (about 140pc). We give a progress report to our long-term project, still in execution with the follow-up spectroscopy of detected substellar companion-candidates, and present some first results.

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