Nitrogen hydrides in interstellar gas: Herschel/HIFI observations towards G10.6-0.4 (W31C)
- Persson, C. M.
- Black, J. H.
- Cernicharo, J.
- Goicoechea, J. R.
- Hassel, G. E.
- Herbst, E.
- Gerin, M.
- de Luca, M.
- Bell, T. A.
- Coutens, A.
- Falgarone, E.
- Goldsmith, P. F.
- Gupta, H., C.
- Kazmierczak, M.
- Lis, D. C.
- Mookerjea, B.
- Neufeld, D. A.
- Pearson, Justin
- Phillips, T. G.
- Sonnentrucker, P.
- Stutzki, J.
- Vastel, C.
- Yu, S.
- Boulanger, F.
- Dartois, E.
- Encrenaz, P.
- Geballe, T. R.
- Giesen, T.
- Godard, B.
- Gry, C.
- Hennebelle, P.
- Hily-Blant, Pierre
- Joblin, C.
- Kolos, R.
- Krelowski, J.
- Martin-Pintado, J.
- Menten, K.
- Monje, R.
- Perault, M.
- Plume, R.
- Salez, M.
- Schlemmer, S.
- Schmidt, M.
- Teyssier, D.
- Peron, I.
- Cais, Ph.
- Cros, A.
- Ravera, L.
- Morris, P.
- Lord, S.
- Planesas, P.
- Gauffre, S.
DOIAbstract
International audienceThe HIFI instrument on board the Herschel Space Observatory has been used to observe interstellar nitrogen hydrides along the sight-line towards G10.6-0.4 in order to improve our understanding of the interstellar chemistry of nitrogen. We report observations of absorption in NH N=1-0, J=2-1 and ortho-NH2 1_1,1-0_0,0. We also observed ortho-NH3 1_0-0_0, and 2_0-1_0, para-NH3 2_1-1_1, and searched unsuccessfully for NH+. All detections show emission and absorption associated directly with the hot-core source itself as well as absorption by foreground material over a wide range of velocities. All spectra show similar, non-saturated, absorption features, which we attribute to diffuse molecular gas. Total column densities o...
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