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Herschel/HIFI discovery of interstellar chloronium (H2Cl+)
CAUX, E.
Centre d'étude spatiale des rayonnements [CESR]
Centre d'étude spatiale des rayonnements [CESR]
Centre d'étude spatiale des rayonnements [CESR]
Centre d'étude spatiale des rayonnements [CESR]
DANIEL, F.
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
Centro de Astrobiologia [Madrid] [CAB]
École normale supérieure - Paris [ENS-PSL]
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
Centro de Astrobiologia [Madrid] [CAB]
École normale supérieure - Paris [ENS-PSL]
GERIN, M.
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
Laboratoire de Radioastronomie [LRA]
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
Laboratoire de Radioastronomie [LRA]
HERBST, E.
Department of Physics [Ohio State University] [OSU]
Ohio State Univ, Dept Astron & Chem, Columbus, OH 43210 USA
Department of Physics [Ohio State University] [OSU]
Ohio State Univ, Dept Astron & Chem, Columbus, OH 43210 USA
OSSENKOPF, V.
Laboratoire Univers et Théories [LUTH (UMR_8102)]
SRON Netherlands Institute for Space Research [SRON]
Laboratoire Univers et Théories [LUTH (UMR_8102)]
SRON Netherlands Institute for Space Research [SRON]
VAN DER TAK, F. F. S.
Kapteyn Astronomical Institute [Groningen]
SRON Netherlands Institute for Space Research [SRON]
Kapteyn Astronomical Institute [Groningen]
SRON Netherlands Institute for Space Research [SRON]
VASTEL, C.
Centre d'étude spatiale des rayonnements [CESR]
Centre d'étude spatiale des rayonnements [CESR]
< Réduire
Centre d'étude spatiale des rayonnements [CESR]
Centre d'étude spatiale des rayonnements [CESR]
Langue
en
Article de revue
Ce document a été publié dans
Astronomy and Astrophysics - A&A. 2010-10, vol. 521, p. L9
EDP Sciences
Résumé en anglais
We report the first detection of chloronium, H2Cl+, in the interstellar medium, using the HIFI instrument aboard the Herschel Space Observatory. The 212-101 lines of ortho-H_235Cl+ and ortho-H_237Cl+ are detected in ...Lire la suite >
We report the first detection of chloronium, H2Cl+, in the interstellar medium, using the HIFI instrument aboard the Herschel Space Observatory. The 212-101 lines of ortho-H_235Cl+ and ortho-H_237Cl+ are detected in absorption towards NGC 6334I, and the 111-000 transition of para-H_235Cl+ is detected in absorption towards NGC 6334I and Sgr B2(S). The H2Cl+ column densities are compared to those of the chemically-related species HCl. The derived HCl/H2Cl+ column density ratios, ~1-10, are within the range predicted by models of diffuse and dense photon dominated regions (PDRs). However, the observed H2Cl+ column densities, in excess of 1013 cm-2, are significantly higher than the model predictions. Our observations demonstrate the outstanding spectroscopic capabilities of HIFI for detecting new interstellar molecules and providing key constraints for astrochemical models. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.Table 1 and acknowledgments (page 5) are only available in electronic form at http://www.aanda.org< Réduire
Mots clés en anglais
astrochemistry
line: identification
ISM: abundances
ISM: molecules
molecular processes
submillimetre: ISM
Origine
Importé de halUnités de recherche