Herschel/HIFI discovery of interstellar chloronium (H2Cl+)

D. C. Lis 1 J. C. Pearson 2 D. A. Neufeld P. Schilke 3, 4 H. S. P. Müller H. Gupta 5 T. A. Bell C. Comito 4 T. G. Phillips 1 E. A. Bergin 6 C. Ceccarelli 7 P. F. Goldsmith G. A. Blake 8 A. Bacmann 9 Alain Baudry 9 M. Benedettini 7 A. Benz J. Black 10 A. Boogert 7 S. Bottinelli 11 S. Cabrit 12 P. Caselli 13 Alain Castets 7 E. Caux 14, 15 J. Cernicharo 16 C. Codella 7 A. Coutens 7 N. Crimier 7 N. R. Crockett F. Daniel 12, 16, 17 K. Demyk 7 C. Dominic M.-L. Dubernet 12 M. Emprechtinger 18 P. Encrenaz 12 E. Falgarone 19 A. Fuente 7 M. Gerin 12, 19 T. F. Giesen J. R. Goicoechea 12 F. Helmich 7 P. Hennebelle 7 Th. Henning 20 E. Herbst 21, 22 P. Hily-Blant 7 Å. Hjalmarson 23 D. Hollenbach T. Jacq 9 C. Joblin 14 D. Johnstone 24 C. Kahane 7 M. Kama 7 M. Kaufman A. Klotz 11, 25 W. D. Langer B. Larsson 7 J. Le Bourlot B. Lefloch 7 F. Le Petit D. Li 26 R. Liseau 2 S. D. Lord A. Lorenzani 13 S. Maret 7 P. G. Martin 27 G. J. Melnick 28 K. M. Menten 29 P. Morris 30 J. A. Murphy Z. Nagy 31 B. Nisini 32 V. Ossenkopf 33, 34 S. Pacheco 7 L. Pagani 12 B. Parise 11, 35 M. Pérault 12 R. Plume 36 S.-L. Qin E. Roueff 33 M. Salez 7 A. Sandqvist 37 P. Saraceno 38 S. Schlemmer 3 K. Schuster 7 R. Snell J. Stutzki 3 A. Tielens N. Trappe 39 F. F. S. Van Der Tak 40, 34 M. H. D. Van Der Wiel E. Van Dishoeck 41 C. Vastel 14, 15 S. Viti 7 Valentine Wakelam 42 A. Walters 7 S. Wang 43 F. Wyrowski 29 H. W. Yorke S. Yu 5 J. Zmuidzinas 18 Y. Delorme 12 J.-P. Desbat R. Güsten 4 J.-M. Krieg 12 B. Delforge
9 FORMATION STELLAIRE 2010
L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux, OASU - Observatoire aquitain des sciences de l'univers, LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], Université Sciences et Technologies - Bordeaux 1
42 AMOR 2010
L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux, OASU - Observatoire aquitain des sciences de l'univers, LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], Université Sciences et Technologies - Bordeaux 1
Abstract : 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
Type de document :
Article dans une revue
Astronomy and Astrophysics - A&A, EDP Sciences, 2010, 521, pp.L9. <10.1051/0004-6361/201014959>
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-00633439
Contributeur : Laurent Pagani <>
Soumis le : mardi 18 octobre 2011 - 15:05:00
Dernière modification le : lundi 29 mai 2017 - 14:31:40

Identifiants

Citation

D. C. Lis, J. C. Pearson, D. A. Neufeld, P. Schilke, H. S. P. Müller, et al.. Herschel/HIFI discovery of interstellar chloronium (H2Cl+). Astronomy and Astrophysics - A&A, EDP Sciences, 2010, 521, pp.L9. <10.1051/0004-6361/201014959>. <hal-00633439>

Partager

Métriques

Consultations de la notice

545