Herschel/HIFI discovery of interstellar chloronium (H2Cl+)

被引：80

作者：

Lis, D. C. ^{[1
]}

Pearson, J. C. ^{[13
]}

Neufeld, D. A. ^{[3
]}

Schilke, P. ^{[8
,12
]}

Mueller, H. S. P. ^{[12
]}

Gupta, H. ^{[13
]}

Bell, T. A. ^{[1
]}

Comito, C. ^{[8
]}

Phillips, T. G. ^{[1
]}

Bergin, E. A. ^{[2
]}

Ceccarelli, C. ^{[6
]}

Goldsmith, P. F. ^{[13
]}

Blake, G. A. ^{[1
]}

Bacmann, A. ^{[6
,26
,27
]}

Baudry, A. ^{[26
,27
]}

Benedettini, M. ^{[28
]}

Benz, A. ^{[40
]}

Black, J. ^{[39
]}

Boogert, A. ^{[19
]}

Bottinelli, S. ^{[4
,5
]}

Cabrit, S. ^{[29
]}

Caselli, P. ^{[30
]}

Castets, A. ^{[6
]}

Caux, E. ^{[4
,5
]}

Cernicharo, J. ^{[7
]}

Codella, C. ^{[31
]}

Coutens, A. ^{[4
,5
]}

Crimier, N. ^{[6
,7
]}

Crockett, N. R. ^{[2
]}

Daniel, F. ^{[7
,9
,17
]}

Demyk, K. ^{[4
,5
]}

Dominic, C. ^{[32
,33
]}

Dubernet, M. -L. ^{[10
,11
]}

Emprechtinger, M. ^{[1
]}

Encrenaz, P. ^{[29
]}

Falgarone, E. ^{[9
,17
]}

Fuente, A. ^{[34
]}

Gerin, M. ^{[9
,17
]}

Giesen, T. F. ^{[12
]}

Goicoechea, J. R. ^{[7
]}

Helmich, F. ^{[23
]}

Hennebelle, P. ^{[9
,17
]}

Henning, Th. ^{[48
]}

Herbst, E. ^{[14
,15
,16
]}

Hily-Blant, P. ^{[6
]}

Hjalmarson, A. ^{[41
]}

Hollenbach, D. ^{[42
]}

Jack, T. ^{[26
,27
]}

Joblin, C. ^{[4
,5
]}

Johnstone, D. ^{[18
]}

机构：

[1] CALTECH, Cahill Ctr Astron & Astrophys 301 17, Pasadena, CA 91125 USA

[2] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[3] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[4] Univ Toulouse UPS, Ctr Etud Spatiale Rayonnements, F-31062 Toulouse 9, France

[5] CNRS INSU, UMR 5187, F-31028 Toulouse 4, France

[6] Observ Grenoble, Astrophys Lab, F-38041 Grenoble 9, France

[7] Ctr Astrobiol CSIC INTA, Lab Astrofis Mol, Madrid 28850, Spain

[8] Max Planck Inst Radioastron, D-53121 Bonn, Germany

[9] Observ Paris, UMR8112, CNRS, LERMA, F-75231 Paris 05, France

[10] Univ Paris 06, UMR7092, LPMAA, Paris, France

[11] Observ Paris, UMR8102, LUTH, Meudon, France

[12] Univ Cologne, Inst Phys 1, D-50937 Cologne, Germany

[13] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[14] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[15] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[16] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA

[17] Ecole Normale Super, F-75231 Paris 05, France

[18] Natl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC V9E 2E7, Canada

[19] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA

[20] Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada

[21] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[22] Natl Univ Ireland, Maynooth, Kildare, Ireland

[23] SRON Netherlands Inst Space Res, NL-9700 AV Groningen, Netherlands

[24] Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada

[25] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA

[26] Univ Bordeaux, Lab Astrophys Bordeaux, Bordeaux, France

[27] CNRS INSU, UMR 5804, Floirac, France

[28] INAF Ist Fis Spazio Interplanetario, Rome, Italy

[29] Observ Paris, LERMA, UMR 8112, CNRS, Paris, France

[30] Univ Leeds, Sch Phys & Astron, Leeds, W Yorkshire, England

[31] INAF Osservatorio Astrofis Arcetri, Florence, Italy

[32] Univ Amsterdam, Astron Inst Anton Pannekoek, Amsterdam, Netherlands

[33] Radboud Univ Nijmegen, Dept Astrophys IMAPP, NL-6525 ED Nijmegen, Netherlands

[34] IGN Observ Astron Nacl, Alcala De Henares, Spain

[35] INAF Osservatorio Astron Roma, Monte Porzio Catone, Italy

[36] Inst RadioAstron Millimetr, Grenoble, France

[37] Leiden Univ, Leiden Observ, Leiden, Netherlands

[38] UCL, Dept Phys & Astron, London, England

[39] Chalmers, Dept Radio & Space Sci, Onsala, Sweden

[40] ETH, Inst Astron, CH-8092 Zurich, Switzerland

[41] Chalmers, Onsala Space Observ, Onsala, Sweden

[42] SETI Inst, Mountain View, CA USA

[43] San Jose State Univ, Dept Phys & Astron, San Jose, CA 95192 USA

[44] Stockholm Univ, Dept Astron, S-10691 Stockholm, Sweden

[45] Observ Paris, LUTH, Meudon, France

[46] Univ Paris 07, Meudon, France

[47] UCP, UPMC, Inst Lab Etud Rayonnement & Mat Astrophys, UMR 8112,CNRS INSU,OP,ENS, Paris, France

[48] Max Planck Inst Astron, D-69117 Heidelberg, Germany

[49] Univ Groningen, Kapteyn Astron Inst, NL-9700 AB Groningen, Netherlands

来源：

ASTRONOMY & ASTROPHYSICS | 2010年 / 521卷

关键词：

astrochemistry; line: identification; ISM: abundances; ISM: molecules; molecular processes; submillimetre: ISM; CHLORINE-BEARING MOLECULES; STAR-FORMING REGION; SPIRAL ARM CLOUDS; NGC; 6334; I; HYDROGEN-CHLORIDE; COLOGNE DATABASE; ISOTOPIC RATIO; GROUND-STATE; SUBMILLIMETER; SPECTROSCOPY;

D O I：

10.1051/0004-6361/201014959

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the first detection of chloronium, H2Cl+, in the interstellar medium, using the HIFI instrument aboard the Herschel Space Observatory. The 2(12)-1(01) lines of ortho-(H2Cl+)-Cl-35 and ortho-(H2Cl+)-Cl-37 are detected in absorption towards NGC 6334I, and the 1(11)-0(00) transition of para-(H2Cl+)-Cl-35 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, similar to 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 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.

引用

页数：5

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