Complex Molecules in Sagittarius B2(N): The Importance of Grain Chemistry

Details Complex Molecules in Sagittarius B2(N): The Importance of Grain Chemistry Complex Molecules in Sagittarius B2(N): The Importance of Grain Chemistry

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996adil...ym...01m&link_type=abstract

NCSA Astronomy Digital Image Library

Astronomy and Astrophysics

Astronomy

Acrylonitriles, Cosmic Dust, Cyanides, Formates, H Ii Regions, Interstellar Chemistry, Interstellar Matter, Methyl Compounds, Molecular Clouds, Star Formation, Water Masers

Scientific paper

The complex molecules vinyl cyanide (CH2CHCN), methyl formate(HCOOCH3), and ethyl cyanide (CH3CH2CN) were observed in Sgr B2 star-forming region with the BIMA millimeter wave length array. A region with diameter less than 0.1 pc toward the Sgr B2(N) molecular core is found to be the major source of these molecules. Also, this source is coincident with continuum emission from dust and a center of H2O maser activity. Ultracompact(UC) HII regions are located within 0.1 pc. Strikingly, none of these molecules is detected toward Sgr B2(M), a core located 1' south of Sgr B2(N). The existence of complex molecules, a large mass of dust, high velocity H2O masers, and UC HII regions strongly suggest that Sgr B2(N) region has just begun to form stars, while the absence of strong dust emssion and large molecules coincident with continuum emission from dust supports the idea found in current chemical modles that grain chemistry is of crucial importance for the formation of these molecules.

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