Complex molecules in Sagittarius B2(N): The importance of grain chemistry

Yanti Miao, David M. Mehringer, Yi-Jehng Kuan, Lewis E. Snyder

研究成果: 雜誌貢獻文章

81 引文 (Scopus)

摘要

The 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 <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 II 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 H II 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.

原文英語
期刊Astrophysical Journal
445
發行號1 PART 2
DOIs
出版狀態已發佈 - 1995 五月 20

指紋

chemistry
dust
molecules
cyanide
H II regions
masers
continuums
stars
acrylonitriles
formates
cyanides
wavelength
wavelengths

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

引用此文

Complex molecules in Sagittarius B2(N) : The importance of grain chemistry. / Miao, Yanti; Mehringer, David M.; Kuan, Yi-Jehng; Snyder, Lewis E.

於: Astrophysical Journal, 卷 445, 編號 1 PART 2, 20.05.1995.

研究成果: 雜誌貢獻文章

Miao, Yanti ; Mehringer, David M. ; Kuan, Yi-Jehng ; Snyder, Lewis E. / Complex molecules in Sagittarius B2(N) : The importance of grain chemistry. 於: Astrophysical Journal. 1995 ; 卷 445, 編號 1 PART 2.
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AB - The 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 <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 II 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 H II 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.

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