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Lis, DC;Pearson, JC;Neufeld, DA;Schilke, P;Muller, HSP;Gupta, H;Bell, TA;Comito, C;Phillips, TG;Bergin, EA;Ceccarelli, C;Goldsmith, PF;Blake, GA;Bacmann, A;Baudry, A;Benedettini, M;Benz, A;Black, J;Boogert, A;Bottinelli, S;Cabrit, S;Caselli, P;Castets, A;Caux, E;Cernicharo, J;Codella, C;Coutens, A;Crimier, N;Crockett, NR;Daniel, F;Demyk, K;Dominic, C;Dubernet, ML;Emprechtinger, M;Encrenaz, P;Falgarone, E;Fuente, A;Gerin, M;Giesen, TF;Goicoechea, JR;Helmich, F;Hennebelle, P;Henning, T;Herbst, E;Hily-Blant, P;Hjalmarson, A;Hollenbach, D;Jack, T;Joblin, C;Johnstone, D;Kahane, C;Kama, M;Kaufman, M;Klotz, A;Langer, WD;Larsson, B;Le Bourlot, J;Lefloch, B;Le Petit, F;Li, D;Liseau, R;Lord, SD;Lorenzani, A;Maret, S;Martin, PG;Melnick, GJ;Menten, KM;Morris, P;Murphy, JA;Nagy, Z;Nisini, B;Ossenkopf, V;Pacheco, S;Pagani, L;Parise, B;Perault, M;Plume, R;Qin, SL;Roueff, E;Salez, M;Sandqvist, A;Saraceno, P;Schlemmer, S;Schuster, K;Snell, R;Stutzki, J;Tielens, A;Trappe, N;van der Tak, FFS;van der Wiel, MHD;van Dishoeck, E;Vastel, C;Viti, S;Wakelam, V;Walters, A;Wang, S;Wyrowski, F;Yorke, HW;Yu, S;Zmuidzinas, J;Delorme, Y;Desbat, JP;Gusten, R;Krieg, JM;Delforge, B
2010
October
Astronomy and Astrophysics
Herschel/HIFI discovery of interstellar chloronium (H2Cl+)
Published
40 ()
Optional Fields
CHLORINE-BEARING MOLECULES STAR-FORMING REGION SPIRAL ARM CLOUDS NGC 6334 I HYDROGEN-CHLORIDE COLOGNE DATABASE ISOTOPIC RATIO GROUND-STATE SUBMILLIMETER SPECTROSCOPY
521
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.
LES ULIS CEDEX A
0004-6361
10.1051/0004-6361/201014959
Grant Details