Journal
ASTROPHYSICAL JOURNAL
Volume 705, Issue 2, Pages 1160-1172Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/705/2/1160
Keywords
ISM: individual (L43, RNO91); stars: formation
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Funding
- NSF [AST-0307250, AST0607793]
- NASA [NNX07AJ72G]
- National Research Foundation of Korea (NRF) government (MEST) [2009-0062865]
- KOSEF [R012007- 000-20336-0]
- National Research Foundation of Korea [2002-0036892, 2007-0055412] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We 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.
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