GOMEZ MERCEDES NIEVES
Congresos y reuniones científicas
Título:
A Near-Infrared Imaging Survey of the Globule 2 in the Coalsack
Autor/es:
G. RACCA, M. GÓMEZ, S.J. KENYON
Lugar:
Córdoba
Reunión:
Congreso; X Reunion Regional Latinoamericana de Astronomia; 2001
Institución organizadora:
IAU
Resumen:
We present results of a near-infrared imaging survey of the Globule 2 in the Coalsack. This Bok globule corresponds to the highest density region of this southern hemisphere molecular cloud and thus the most likely region where young stars might be forming in this complex. The survey is complete for K < 14.0, H < 14.5, and J < 15.5, several magnitudes more sensitive than previous observations of
this globule. We use the large number of background stars detected to derive an accurate near-infrared extinction law for the cloud. We applied the J−H/H−K color-color diagram to search for candidate young stellar objects. We detect only three potential young stars in the Globule 2 with K < 14.0. This result indicates a low activity for the Coalsack as a stellar nursery. On the other hand, the detection of three potential young stars suggests a star-formation efficiency (about 15%) for the Globule 2 similar to other well known star-forming regions, such as Taurus and Chamaeleon I.
this globule. We use the large number of background stars detected to derive an accurate near-infrared extinction law for the cloud. We applied the J−H/H−K color-color diagram to search for candidate young stellar objects. We detect only three potential young stars in the Globule 2 with K < 14.0. This result indicates a low activity for the Coalsack as a stellar nursery. On the other hand, the detection of three potential young stars suggests a star-formation efficiency (about 15%) for the Globule 2 similar to other well known star-forming regions, such as Taurus and Chamaeleon I.
