Estrellas jóvenes en la nube molecular del Camaleón II

CHAVERO, C.; MAZZALAY, X; PAZ, D; QUINZIO, B.; RACCA, G.; SALES, L; STASYSZYN, F.; AHUMADA, A.; GÓMEZ, M.

Buenos Aires

Congreso; Reunión Anual de Asociación Argentina de Astronomía; 2002

Instituto de Astronomía y Física del Espacio

We present optical spectra of three candidate young stellar objects in the Chamaeleon II dark cloud. The observations were carried out at the CASLEO with the REOSC (DS) spectrograph, covering a spectral range between 5000 < λ < 8000 Å. These objects were selected from two lists of candidate young stars proposed by Larson et al. (1998, A&A 337:465) and Voung et al. (2001, A&A 379:208) based on the infrared excesses. We find Hα in emission in two of the three objects. This is an indicator of the pre-main sequence evolutionary state of a star. In addition, for one of the objects with Hα in emission we detect the TiO absorption bands (6180 and 7100 Å), characteristic of the M spectral type. The nature of the third object remains uncertain and higher signal to noise spectra are required to clarify its evolutionary status.