Dust and Gas Temperature of the Prestellar Core TMC-1C

Astronomy and Astrophysics – Astronomy

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Scientific paper

TMC-1C is a starless core in the nearby Taurus molecular cloud. It is one of a handful of prestellar cores with observed (sub-sonic) infall. Here we present continuum emission maps of TMC-1C at 0.45, 0.85, 1.2 and 2.1 millimeters taken with the JCMT, IRAM and CSO, from which we derive the dust temperature, column density and emissivity spectral index. We compare the dust temperature with the gas temperature derived from GBT ammonia (1,1) and (2,2) maps and find excellent agreeement, as predicted by numerical models. We study the core kinematics with interferometric (CARMA) and single dish (CSO, GBT and IRAM-30m) observations of lines from molecules with little or no depletion (NH3, NH2D, and N2H+) to derive the infall velocity, angular momentum and turbulent linewidth.

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