| Observations of interstellar HOCO+: abundance enhancements toward the galactic center. | |
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MedLine Citation:
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PMID: 11538465 Owner: NASA Status: MEDLINE |
Abstract/OtherAbstract:
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A survey of the 4(04)-3(03) and 1(01)-0(00) transitions of HOCO+ has been made toward several molecular clouds. The HOCO+ molecule was not observed in any sources except Sgr B2 and Sgr A. The 5(05)-4(04) and 4(14)-3(13) transitions were also detected toward Sgr B2. The results indicate that gas phase CO2 is not a major carbon reservoir in typical molecular clouds. In Sgr B2, the HOCO+ antenna temperature exhibits a peak approximately 2' north of the Sgr B2 central position (Sgr B2[M]) and the 4(04)-3(03) line emission is extended over a approximately 10' x 10' region. The column density of HOCO+ at the northern peak in Sgr B2 is approximately 3 x 10(14) cm-2, and the fractional abundance relative to H2 > or = 3 x 10(-10), which is about 2 orders of magnitude greater than recent predictions of quiescent cloud ion-molecule chemistry. |
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Authors:
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Y C Minh; W M Irvine; L M Ziurys |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The Astrophysical journal Volume: 334 ISSN: 0004-637X ISO Abbreviation: Astrophys. J. Publication Date: 1988 Nov |
Date Detail:
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Created Date: 1996-05-17 Completed Date: 1996-05-17 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 9890633 Medline TA: Astrophys J Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 175-81 Citation Subset: S |
Affiliation:
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Five College Radio Astronomy Observatory, University of Massachusetts, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Astronomical Phenomena Astronomy Carbon Dioxide / analysis, chemistry* Chemical Phenomena Chemistry Extraterrestrial Environment* Ions Spectrum Analysis |
| Grant Support | |
ID/Acronym/Agency:
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AST-85-12903/AS/SAMHSA HHS |
| Chemical | |
Reg. No./Substance:
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0/Ions; 124-38-9/Carbon Dioxide |
| Investigator | |
Investigator/Affiliation:
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W M Irvine / U MA, Amherst, FCRAO |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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