NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Complex molecules in Sagittarius B2(N): The importance of grain chemistryThe complex molecules vinyl cyanide (CH2CHCN), methyl formate (HCOOCH3), and ethyl cyanide (CH3CH2CN) were observed in the Sgr B2 star-forming region with the BIMA millimeter wavelength 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) H 11 regions are located within 0.1 pc. Strikingly, none of these molecules is detected toward Sgr B2(M), a core located 1 minute south of Sgr B2(N). The existence of complex molecules, a large mass of dust, high-velocity H2O masers, and UC H 11 regions strongly suggests that the Sgr B2(N) region has just begun to form stars, while the absence of strong dust emission and large molecules suggests Sgr B2(M) is more evolved. The detection of large molecules coincident with continuum emission from dust supports the idea found in current chemical models that grain chemistry is of crucial importance for the formation of these molecules.
Document ID
19950056285
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Miao, Yanti
(University of Illinois, Urbana, Illinois United States)
Mehringer, David M.
(University of Illinois, Urbana, Illinois United States)
Kuan, Yi-Jheng
(University of Illinois, Urbana, Illinois United States)
Snyder, Lewis E.
(University of Illinois, Urbana, Illinois United States)
Date Acquired
August 16, 2013
Publication Date
May 20, 1995
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 445
Issue: 1
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
95A87884
Funding Number(s)
CONTRACT_GRANT: NAGW-2299
CONTRACT_GRANT: NSF AST-93-20239
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available