An Examination of Starless Molecular Cloud Cores in the SIRTF Cores-to-Disks Sample

Details An Examination of Starless Molecular Cloud Cores in the SIRTF Cores-to-Disks Sample An Examination of Starless Molecular Cloud Cores in the SIRTF Cores-to-Disks Sample

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...20314702r&link_type=abstract

American Astronomical Society Meeting 203, #147.02; Bulletin of the American Astronomical Society, Vol. 36, p.592

Astronomy and Astrophysics

Astronomy

Scientific paper

The SIRTF Legacy Cores-to-Disks (c2d) program has compiled a database of molecular cloud cores planned for observations using SIRTF. Cores in the c2d sample have not been examined for star formation using a uniform database since IRAS (launched 1983). We used the 2MASS database to examine the c2d sample of molecular cloud cores which have been classified as ''starless'' for infrared excess sources, which, if found, would imply that their classification should be changed. (J-H)---(H-Kshort) color-color diagrams are used to identify sources with IR excess. IR excess sources whose projected positions lie within extinction boundaries of the cores were examined further, using spectral energy distributions, in an attempt to classify them. We examined 76 cores which are ''starless'' according to IRAS and found five with stars having 2MASS color excess projected on positions of significant extinction: L328, L462-1, L673, BHR16, and CB125. Of these five cores, all have at least one star with colors typical of T Tauri stars while three (BHR16, L673, and CB125) each have one star with protostar colors.
This work was supported in part by the SAO intern program under NSF grant AST-9731923.

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