Other
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934109r&link_type=abstract
American Astronomical Society, AAS Meeting #219, #341.09
Other
Scientific paper
We present Spitzer mid-infrared and far-infrared images of the Mon OB1 giant molecular cloud, which contains the young star forming region NGC 2264 and several sub-clusters of young stellar objects (YSOs). With the Spitzer data, along with 2MASS photometry, we classify YSOs in the entire Mon OB1 giant molecular cloud (GMC) by their infrared-excess emission and study their distribution with respect to cloud material. We find that in regions with higher spatial YSO and molecular gas density there is a strong correlation between local surface density of YSOs and density of molecular gas as traced by dust. This correlation is roughly described as a power law in these quantities. We use a number counting technique to determine the fraction of cloud members which are YSOs for different portions of the cloud that have differing average extinctions. We find that this disk fraction differs between the NGC 2264 region alone and the other regions of the Mon OB1 GMC. We compare these results with other molecular clouds and contrast our results for the NGC 2264 region with other estimates in the literature which use a different YSO classification approach.
Allen Terry
Gutermuth Robert A.
Megeath Thomas S.
Pipher Judith L.
Rapson Valerie
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