Jo-Hsin Chen et al. 2009 ApJ 705 1160 doi:10.1088/0004-637X/705/2/1160
Jo-Hsin Chen1, Neal J. Evans II1, Jeong-Eun Lee2 and Tyler L. Bourke3
Show affiliationsWe present results from the Spitzer Space Telescope and molecular line observations of nine species toward the dark cloud L43. The Spitzer images and molecular line maps suggest that it has a starless core and a Class I protostar evolving in the same environment. CO depletion is seen in both sources, and DCO+ lines are stronger toward the starless core. With a goal of testing the chemical characteristics from pre- to protostellar stages, we adopt an evolutionary chemical model to calculate the molecular abundances and compare with our observations. Among the different model parameters we tested, the best-fit model suggests a longer total timescale at the pre-protostellar stage, but with faster evolution at the later steps with higher densities.
Issue 2 (2009 November 10)
Received 2009 June 17, accepted for publication 2009 September 23
Published 2009 October 19
Jo-Hsin Chen et al. 2009 ApJ 705 1160
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