The Relation Between Dust and Gas in the Taurus Molecular Cloud

Details The Relation Between Dust and Gas in the Taurus Molecular Cloud The Relation Between Dust and Gas in the Taurus Molecular Cloud

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011eas....52..157p&link_type=abstract

EAS Publications Series, Volume 52, 2011, pp.157-160

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Scientific paper

We report a study of the relation between dust and gas over a 100 deg2 area in the Taurus molecular cloud. We compare the H2 column density derived from dust extinction with the CO column density derived from the 12CO and 13CO J = 1 → 0 lines. We derive the visual extinction from reddening determined from 2MASS data. The comparison is done at an angular size of 200'', corresponding to 0.14 pc at a distance of 140 pc. We find that the relation between visual extinction AV and N(CO) is linear between AV ≃ 3 and 10 mag in the region associated with the B213-L1495 filament. In other regions the linear relation flattens for AV ≳ 4 mag. Accounting for the observed relation between the column density of CO and CO2 ices and AV, we find a linear relationship between the column of carbon monoxide and dust for observed visual extinctions up to the maximum value in our data ≃23 mag.

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