2010A&A...521L...9L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST05:10:02

2010A&A...521L...9L - Astronomy and Astrophysics, volume 521, L9-9 (2010/10-1)

Herschel/HIFI discovery of interstellar chloronium (H2Cl+).

LIS D.C., PEARSON J.C., NEUFELD D.A., SCHILKE P., MUELLER H.S.P., GUPTA H., BELL T.A., COMITO C., PHILLIPS T.G., BERGIN E.A., CECCARELLI C., GOLDSMITH P.F., BLAKE G.A., 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 N.R., DANIEL F., DEMYK K., DOMINIC C., DUBERNET M.-L., EMPRECHTINGER M., ENCRENAZ P., FALGARONE E., FUENTE A., GERIN M., GIESEN T.F., GOICOECHEA J.R., HELMICH F., HENNEBELLE P., HENNING Th., HERBST E., HILY-BLANT P., HJALMARSON A., HOLLENBACH D., JACK T., JOBLIN C., JOHNSTONE D., KAHANE C., KAMA M., KAUFMAN M., KLOTZ A., LANGER W.D., LARSSON B., LE BOURLOT J., LEFLOCH B., LE PETIT F., LI D., LISEAU R., LORD S.D., LORENZANI A., MARET S., MARTIN P.G., MELNICK G.J., MENTEN K.M., MORRIS P., MURPHY J.A., NAGY Z., NISINI B., OSSENKOPF V., PACHECO S., PAGANI L., PARISE B., PERAULT M., PLUME R., QIN S.-L., ROUEFF E., SALEZ M., SANDQVIST A., SARACENO P., SCHLEMMER S., SCHUSTER K., SNELL R., STUTZKI J., TIELENS A., TRAPPE N., VAN DER TAK F.F.S., VAN DER WIEL M.H.D., VAN DISHOECK E.F., VASTEL C., VITI S., WAKELAM V., WALTERS A., WANG S., WYROWSKI F., YORKE H.W., YU S., ZMUIDZINAS J., DELORME Y., DESBAT J.-P., GUESTEN R., KRIEG J.-M. and DELFORGE B.

Abstract (from CDS):

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-H235Cl+ and ortho-H237Cl+ are detected in absorption towards NGC 6334I, and the 111-000 transition of para-H235Cl+ 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 1013cm–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.

Abstract Copyright:

Journal keyword(s): astrochemistry - line: identification - ISM: abundances - ISM: molecules - molecular processes - submillimetre: ISM

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2133 0
2 NGC 6334 HII 17 20 51 -36 06.9           ~ 585 0
3 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 269 0
4 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11533 0
5 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1909 1
6 NAME Sgr B2 (South) HII 17 47 20.430 -28 23 45.06           ~ 85 0
7 NAME Sgr B2 Main Rad 17 47 20.5 -28 23 06           ~ 331 1
8 RAFGL 2591 Y*O 20 29 25.03656 +40 11 20.3316           ~ 570 0

    Equat.    Gal    SGal    Ecl

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2020.07.05-05:10:02

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