Herschel/HIFI discovery of interstellar chloronium (H2Cl+)
Artikel i vetenskaplig tidskrift, 2010
We report the first detection of chloronium, H_2Cl^+, in the interstellar medium, using the HIFI instrument aboard the Herschel Space Observatory. The 2_12-1_01 lines of ortho-H\_2^35Cl^+ and ortho-H\_2^37Cl^+ are detected in absorption towards NGC 6334I, and the 1_11-0_00 transition of para-H\_2^35Cl^+ is detected in absorption towards NGC 6334I and Sgr B2(S). The H_2Cl^+ column densities are compared to those of the chemically-related species HCl. The derived HCl/H_2Cl^+ column density ratios, ~1-10, are within the range predicted by models of diffuse and dense photon dominated regions (PDRs). However, the observed H_2Cl^+ column densities, in excess of 10^13 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.
submillimetre: ISM
astrochemistry
molecular processes
Line: identification
ISM: abundances
ISM: molecules
Författare
D. C. Lis
Jet Propulsion Laboratory, California Institute of Technology
J. C. Pearson
Jet Propulsion Laboratory, California Institute of Technology
D. A. Neufeld
Johns Hopkins University
P. Schilke
Universität zu Köln
H. S. P. Müller
Universität zu Köln
H. Gupta
National Science Foundation
T. A. Bell
Centro de Astrobiología (INTA-CSIC)
C. Comito
Forschungszentrum Jülich
T. G. Phillips
California Institute of Technology (Caltech)
E. A. Bergin
University of Michigan
C. Ceccarelli
Université Grenoble Alpes
P. F. Goldsmith
Jet Propulsion Laboratory, California Institute of Technology
G. A. Blake
California Institute of Technology (Caltech)
A. Bacmann
Université Grenoble Alpes
A. Baudry
Université de Bordeaux
M. Benedettini
Istituto nazionale di astrofisica (INAF)
A. Benz
Fachhochschule Nordwestschweiz
John H Black
Chalmers, Institutionen för radio- och rymdvetenskap, Radioastronomi och astrofysik
A. Boogert
University of Hawaii
S. Bottinelli
Universite Paul Sabatier Toulouse III
S. Cabrit
Observatoire de Paris
P. Caselli
Max-Planck-Institut für extraterrestrische Physik
A. Castets
Université Grenoble Alpes
E. Caux
Universite Paul Sabatier Toulouse III
J. Cernicharo
CSIC - Instituto de Fisica Fundamental (IFF)
C. Codella
Osservatorio Astrofisico di Arcetri
A. Coutens
Université de Bordeaux
N. Crimier
ProbaYes SAS
N. R. Crockett
California Institute of Technology (Caltech)
F. Daniel
Université Grenoble Alpes
K. Demyk
Universite Paul Sabatier Toulouse III
C. Dominic
Radboud Universiteit
M.-L. Dubernet
Observatoire de Paris
M. Emprechtinger
California Institute of Technology (Caltech)
P. Encrenaz
Observatoire de Paris
E. Falgarone
Ecole Normale Superieure (ENS)
A. Fuente
Observatorio Astronómico Nacional (OAN)
M. Gerin
Observatoire de Paris
T. F. Giesen
Universität Kassel
J. R. Goicoechea
CSIC - Instituto de Fisica Fundamental (IFF)
F. Helmich
Rijksuniversiteit Groningen
P. Hennebelle
Ecole Normale Superieure (ENS)
T. Henning
Max-Planck Institut für Radioastronomie
E. Herbst
University of Virginia
P. Hily-Blant
Université Grenoble Alpes
Åke Hjalmarson
Chalmers, Institutionen för radio- och rymdvetenskap, Radioastronomi och astrofysik
D. Hollenbach
SETI Institute
T. Jack
Université de Bordeaux
C. Joblin
National Museum of Botswana
D. Johnstone
University of Victoria
C. Kahane
Université Grenoble Alpes
M. Kama
University College London (UCL)
M. Kaufman
San Jose State University
A. Klotz
Universite Paul Sabatier Toulouse III
W. D. Langer
Jet Propulsion Laboratory, California Institute of Technology
B. Larsson
Stockholms universitet
J. Le Bourlot
Observatoire de Paris
B. Lefloch
Université Grenoble Alpes
F. Le Petit
Observatoire de Paris
D. Li
University of KwaZulu-Natal
René Liseau
Chalmers, Institutionen för radio- och rymdvetenskap, Radioastronomi och astrofysik
S. D. Lord
California Institute of Technology (Caltech)
A. Lorenzani
Istituto nazionale di astrofisica (INAF)
S. Maret
Université Grenoble Alpes
P. G. Martin
Institut canadien d'astrophysique théorique
G. J. Melnick
Harvard-Smithsonian Center for Astrophysics
K. M. Menten
Max-Planck Institut für Radioastronomie
P. Morris
California Institute of Technology (Caltech)
J. A. Murphy
Maynooth University
Z. Nagy
Konkoly Observatory
B. Nisini
Osservatorio Astronomico di Roma
V. Ossenkopf
Istituto nazionale di astrofisica (INAF)
S. Pacheco
Institut de Planetologie et d'Astrophysique de Grenoble
L. Pagani
Sorbonne Université
B. Parise
Max-Planck Institut für Radioastronomie
M. Pérault
Ecole Normale Superieure (ENS)
R. Plume
University of Calgary
S.-L. Qin
Yunnan University
E. Roueff
Observatoire de Paris
M. Salez
Centre national de la recherche scientifique (CNRS)
A. Sandqvist
Stockholms observatorium
P. Saraceno
Istituto nazionale di astrofisica (INAF)
S. Schlemmer
Universität zu Köln
K. Schuster
Institut de Radioastronomie Millimétrique (IRAM)
R. Snell
University of Massachusetts
J. Stutzki
Universität zu Köln
A. Tielens
Universiteit Leiden
N. Trappe
Maynooth University
F. F. S. van der Tak
Rijksuniversiteit Groningen
M. H. D. van der Wiel
Netherlands Institute for Radio Astronomy (ASTRON)
E. van Dishoeck
Universiteit Leiden
C. Vastel
Universite Paul Sabatier Toulouse III
S. Viti
Universiteit Leiden
V. Wakelam
Université de Bordeaux
A. Walters
Universite Paul Sabatier Toulouse III
S. Wang
University of Michigan
F. Wyrowski
Max-Planck Institut für Radioastronomie
H. W. Yorke
Universities Space Research Association
S. Yu
Jet Propulsion Laboratory, California Institute of Technology
J. Zmuidzinas
California Institute of Technology (Caltech)
Y. Delorme
Observatoire de Paris
J.-P. Desbat
Université de Bordeaux
R. Güsten
Max-Planck Institut für Radioastronomie
J.-M. Krieg
Sorbonne Université
B. Delforge
Rijksuniversiteit Groningen
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 521 1 L9Ämneskategorier
Astronomi, astrofysik och kosmologi
Fundament
Grundläggande vetenskaper
DOI
10.1051/0004-6361/201014959