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, B., 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. and Yildiz, U. A. (2010). Hydrides in young stellar objects: Radiation tracers in a protostar-disk-outflow system. Astron. Astrophys., 521. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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Abstract

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 (similar or equal to 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 relative to the young stellar object (YSO). In addition, H2O+ and OH+ also contain strong absorption components at a velocity shifted relative to W3 IRS5, which are attributed to foreground clouds. Conclusions. The molecular column densities derived from observations correlate well with the predictions of a model that assumes the main emission region is in outflow walls, heated and irradiated by protostellar UV radiation.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Benz, A. O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bruderer, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van Dishoeck, E. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Staeuber, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wampfler, S. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Melchior, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dedes, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wyrowski, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Doty, S. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van der Tak, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Baechtold, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Csillaghy, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Megej, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Monstein, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Soldati, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bachiller, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Baudry, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benedettini, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bergin, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bjerkeli, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blake, G. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bontemps, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Braine, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Caselli, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cernicharo, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Codella, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Daniel, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
di Giorgio, A. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dieleman, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dominik, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Encrenaz, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fich, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fuente, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Giannini, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goicoechea, J. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Graauw, Th.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Helmich, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Herczeg, G. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Herpin, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hogerheijde, M. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jacq, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jellema, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Johnstone, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jorgensen, J. K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kristensen, L. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Larsson, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lis, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liseau, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marseille, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
McCoey, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Melnick, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Neufeld, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nisini, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Olberg, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ossenkopf, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Parise, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pearson, J. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Plume, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Risacher, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Santiago-Garcia, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Saraceno, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schieder, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shipman, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stutzki, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tafalla, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tielens, A. G. G. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van Kempen, T. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Visser, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yildiz, U. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-494673
DOI: 10.1051/0004-6361/201015111
Journal or Publication Title: Astron. Astrophys.
Volume: 521
Date: 2010
Publisher: EDP SCIENCES S A
Place of Publication: LES ULIS CEDEX A
ISSN: 1432-0746
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
INTERSTELLAR OH+; H2O+; REGIONS; CHEMISTRY; EMISSION; CLOUDS; W3IRS5; WATER; H3O+Multiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/49467

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