Hydrides in young stellar objects: radiation tracers in a protostar-disk-outflow system [Letter]
- Benz, A. O.
- Bruderer, S.
- van Dishoeck, E. F.
- Staeuber, P.
- Wampfler, S. F.
- Melchior, M.
- Dedes, C.
- Wyrowski, F.
- Doty, S. D.
- van der Tak, F.
- Baechtold, W.
- Csillaghy, A.
- Megej, A.
- Monstein, C.
- Soldati, M.
- Bachiller, R.
- Baudry, A.
- Benedettini, M.
- Bergin, E.
- Bjerkeli, P.
- Blake, G. A.
- Bontemps, S.
- Braine, J.
- Caselli, P.
- Cernicharo, J.
- Codella, C.
- Daniel, F.
- di Giorgio, A. M.
- Dieleman, P.
- Dominik, C.
- Encrenaz, P.
- Fich, M.
- Fuente, A.
- Giannini, T.
- Goicoechea, J. R.
- de Graauw, Th.
- Helmich, F.
- Herczeg, G. J.
- Herpin, F.
- Hogerheijde, M. R.
- Jacq, T.
- Jellema, W.
- Johnstone, D.
- Jorgensen, J. K.
- Kristensen, L. E.
- Larsson, B.
- Lis, D.
- Liseau, R.
- Marseille, M.
- McCoey, C.
- Melnick, G.
- Neufeld, D.
- Nisini, B.
- Olberg, M.
- Ossenkopf, V.
- Parise, Berengere
- Pearson, J. C.
- Plume, R.
- Risacher, C.
- Santiago-Garcia, J.
- Saraceno, P.
- Schieder, R.
- Shipman, R.
- Stutzki, J.
- Tafalla, M.
- Tielens, A. G. G. M.
- van Kempen, T. A.
- Visser, R.
- Yildiz, U. A.
DOIAbstract
Context. Hydrides of the most abundant heavier elements are fundamental molecules in cosmic chemistry. Some of them trace gas irradiated by UV or X-rays. Aims. We explore the abundances of major hydrides in W3 IRS5, a prototypical region of high-mass star formation. Methods. W3 IRS5 was observed by HIFI on the Herschel Space Observatory with deep integration (2500 s) in 8 spectral regions. Results. The target lines including CH, NH, H3O+, and the new molecules SH+, H2O+, and OH+ are detected. The H2O+ and OH+ J = 1–0 lines are found mostly in absorption, but also appear to exhibit weak emission (P-Cyg-like). Emission requires high density, thus originates most likely near the protostar. This is corroborated by the absence of line shifts ...
Add to ORKG