SIMBAD references

2016ApJ...825...79S - Astrophys. J., 825, 79-79 (2016/July-1)

Survey observations of a possible glycine precursor, methanimine (CH2NH).

SUZUKI T., OHISHI M., HIROTA T., SAITO M., MAJUMDAR L. and WAKELAM V.

Abstract (from CDS):

We conducted survey observations of a glycine precursor, methanimine, or methylenimine (CH2NH), with the Nobeyama Radio Observatory 45 m telescope and the Sub-Millimeter Radio telescope toward 12 high-mass and two low-mass star-forming regions in order to increase the number of known CH2NH sources and to better understand the characteristics of CH2NH sources. As a result of our survey, CH2NH was detected in eight sources, including four new sources. The estimated fractional abundances were ∼10–8 in Orion KL and G10.47+0.03, while they were ∼10–9 toward the other sources. Our hydrogen recombination line and past studies suggest that CH2NH-rich sources have less (this mean not so evolved) evolved H ii regions. The lower destruction rates from UV flux from the central star would contribute to the high CH2NH abundances toward CH2NH-rich sources. Our gas-grain chemical simulations suggest that CH2NH is mostly formed in the gas phase by neutral-neutral reactions, rather than being the product of thermal evaporation from dust surfaces.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): astrochemistry - ISM: abundances - ISM: molecules - line: identification - methods: observational

Errata: erratum vol. 831, art. 114 (2016)

Simbad objects: 23

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2019.12.14-01:01:38

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