| Autor: |
Pineda, J. L., Goldsmith, P. F., Chapman, N. L., Snell, R., Li, D., Cambrésy, C., Brunt, C. |
| Předmět: |
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| Zdroj: |
EAS Publications Series; 2011, Vol. 52, p157-160, 4p |
| Abstrakt: |
We report a study of the relation between dust and gas over a 100 deg 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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