Early Results of the 3mm Spectral Line Survey toward the Lynds 1157 B1 Shocked Region

Details Early Results of the 3mm Spectral Line Survey toward the Lynds 1157 B1 Shocked Region Early Results of the 3mm Spectral Line Survey toward the Lynds 1157 B1 Shocked Region

Apr 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011pasj...63..459s&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.63, No.2, pp.459-472

Astronomy and Astrophysics

Astronomy

2

Ism: Abundances, Ism: Individual (Lynds 1157), Ism: Jets And Outflows, Ism: Molecules

Scientific paper

We have conducted a sensitive 3 mm observation toward the shocked region, Lynds 1157 B1, which is an interaction spot between a molecular outflow and its ambient gas. We have successfully detected the CH3CHO, HCOOCH3, and HCOOH lines, as well as the CH3DOH line. The abundances of these molecules relative to CH3OH are found to be lower than those in the low-mass star-forming core, IRAS 16293-2422. Since these molecules are thought to evaporate from grain mantles, the observational results mean that complex molecules are less abundant in grain mantles residing in the ambient cloud surrounding a prestellar/protostellar core. Instead, efficient formation of the complex organic species and deuterated species should take place in a prestellar/protostellar core. The present result verifies the importance of an unbiased line survey of this source.

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