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          Institute: MPI für Radioastronomie     Collection: Publikationen des MPI für Radioastronomie     Display Documents

ID: 125413.0, MPI für Radioastronomie / Publikationen des MPI für Radioastronomie
First detections of extragalactic SO2, NS and NO
Authors:Martin, S.; Mauersberger, R.; Martin-Pintado, J.; Garcia-Burillo, S.; Henkel, C.
Date of Publication (YYYY-MM-DD):2003-11
Title of Journal:Astronomy & Astrophysics
Journal Abbrev.:Astron. Astrophys.
Issue / Number:2
Start Page:L465
End Page:L468
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We report the first detections of SO2, NS and NO in an extragalactic source, the nucleus of the starburst galaxy NGC 253. Five SO2 transitions, three groups of hyperfine components of NO and five of NS were detected. All three species show large abundances averaged over the inner 200 pc of NGC 253. With a relative abundance of a few 10(-7), the emission of the NO molecule is similar or even larger than that found in Galactic star forming regions. The derived relative molecular abundances for each molecule have been compared with those of prototypical Galactic molecular clouds. These results seem to confirm that large scale shocks dominate the chemistry of these molecules in the nucleus of NGC 253, ruling out a chemistry dominated by PDRs for the bulk of the gas.
Free Keywords:ISM : molecules, galaxies : individual : NGC 253, galaxies : ISM, galaxies : starburst, galaxies : abundances
Comment of the Author/Creator:Date: 2003, NOV
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Radioastronomie
External Affiliations:IRAM, Granada 18012, Spain.; CSIC, Inst Estructura Mat, Dept Astrofis Mol & Infrarroja, E-28006 Madrid, Spain.; OAN, Madrid 28800, Spain.; Max Planck Inst Radioastron, D-53121 Bonn, Germany.
Identifiers:ISI:000186536600002 [ID No:1]
ISSN:0004-6361 [ID No:2]
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