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



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ID: 125406.0, MPI für Radioastronomie / Publikationen des MPI für Radioastronomie
Far-infrared detection of 17OH towards Sagittarius B2
Authors:Polehampton, E. T.; Brown, J. M.; Swinyard, B. M.; Baluteau, J. P.
Language:English
Date of Publication (YYYY-MM-DD):2003-08
Title of Journal:Astronomy & Astrophysics
Journal Abbrev.:Astron. Astrophys.
Volume:406
Issue / Number:2
Start Page:L47
End Page:L50
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The frequencies and line strengths of the (2)Pi(3/2) J = 5/2-3/2 rotational transition of (OH)-O-17 have been calculated from an analysis of its far-infrared laser magnetic resonance spectrum. These results have been used to make the first detection of a pure rotational transition of (OH)-O-17 in the ISM. Two resolved components of this transition appear in absorption towards the giant molecular cloud Sagittarius B2, which was observed at a spectral resolution of 33 km s(-1) with the Fabry-Perot mode of the ISO Long Wavelength Spectrometer. The corresponding transition of (OH)-O-18 was also observed and its line shape was modelled using H. measurements. The O-18/O-17 ratio of 3.5 was then used to compare this with the observed (OH)-O-17 line shape.
Free Keywords:infrared : ISM, molecular data, ISM : molecules, line : identification, ISM : individual objects : Sagittarius B2
Comment of the Author/Creator:Date: 2003, AUG
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Radioastronomie
External Affiliations:Max Planck Inst Radioastron, D-53121 Bonn, Germany.; Phys & Theoret Chem Lab, Oxford OX1 3QZ, England.; Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.; CNRS, Lab Astrophys Marseille, F-13376 Marseille 12, France.; Univ Aix Marseille 1, F-13376 Marseille 12, France.
Identifiers:ISI:000184222200005 [ID No:1]
ISSN:0004-6361 [ID No:2]
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