期刊
ASTROPHYSICAL JOURNAL
卷 819, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/0004-637X/819/2/140
关键词
astrochemistry; ISM: molecules; stars: formation; stars: protostars
资金
- INSU/CNRS (France)
- MPG (Germany)
- IGN (Spain)
- Simons Collaboration on the Origins of Life Investigator award [321183]
- Alfred P. Sloan Foundation
- David and Lucile Packard Foundation
Large interstellar organic molecules are potential precursors of prebiotic molecules. Their formation pathways and chemical relationships with one another and simpler molecules are therefore of great interest. In this paper we address the relationships between two classes of large organic molecules, carbon chains and saturated complex organic molecules at the early stages of star formation through observations of C4H and CH3OH. We surveyed these molecules with the IRAM 30 m telescope toward 16 deeply embedded low-mass protostars selected from the Spitzer c2d ice survey. We find that CH3OH and C4H are positively correlated, indicating that these two classes of molecules can coexist during the embedded protostellar stage. The C4H/CH3OH gas abundance ratio tentatively correlates with the CH4/CH3OH ice abundance ratio in the same lines of sight. This relationship supports a scenario where carbon chain formation in protostellar envelopes begins with CH4 ice desorption.
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