期刊
ASTROPHYSICAL JOURNAL
卷 705, 期 2, 页码 1160-1172出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/705/2/1160
关键词
ISM: individual (L43, RNO91); stars: formation
资金
- 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)
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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