Chemistry and Dynamics in the Taurus Molecular Cloud-1(TMC-1)

Details Chemistry and Dynamics in the Taurus Molecular Cloud-1(TMC-1) Chemistry and Dynamics in the Taurus Molecular Cloud-1(TMC-1)

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21560639c&link_type=abstract

American Astronomical Society, AAS Meeting #215, #606.39; Bulletin of the American Astronomical Society, Vol. 36, p.1136

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a study of a low-mass star-forming region, Taurus Molecular Cloud-1 (TMC-1), with the Spitzer data combined with the 1.2 mm MAMBO data. The MAMBO map, which presents the best the column density distribution, is the first map to cover the whole TMC-1 ridge in dust continuum. In addition, CS (J=2-1), N2H+ (J=1-0), C17O (J=2-1), C18O (J=2-1) are observed at the FCRAO and the SRAO. We also carried out chemical modeling to investigate relative molecular distribution in the TMC-1 ridge. Based on Spitzer observations, there is no young stellar object along the TMC-1 ridge while five Class II and one Class I objects were identified outside the ridge. The comparison between the column densities calculated from the dust continuum and the C17O 2-1 line emission shows that CO is depleted much more significantly at the ammonia peak than at the cyanopolyyne peak while the column densities calculated from the dust continuum are similar at the two peaks. N2H+ is not depleted at the both peaks. According to our chemical calculation, this differential chemical distribution at the two peaks can be explained by different dynamical timescales at the same density, i.e., by different dynamical processes.

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