Universität zu Köln

Gupta, H., Rimmer, P., Pearson, J. C., Yu, S., Herbst, E., Harada, N., Bergin, E. A., Neufeld, D. A., Melnick, G. J., Bachiller, R., Baechtold, W., Bell, T. A., Blake, G. A., Caux, E., Ceccarelli, C., Cernicharo, J., Chattopadhyay, G., Comito, C., Cabrit, S., Crockett, N. R., Daniel, F., Falgarone, E., Diez-Gonzalez, M. C., Dubernet, M. -L., Erickson, N., Emprechtinger, M., Encrenaz, P., Gerin, M., Gill, J. J., Giesen, T. F., Goicoechea, J. R., Goldsmith, P. F., Joblin, C., Johnstone, D., Langer, W. D., Larsson, B., Latter, W. B., Lin, R. H., Lis, D. C., Liseau, R., Lord, S. D., Maiwald, F. W., Maret, S., Martin, P. G., Martin-Pintado, J., Menten, K. M., Morris, P., Mueller, H. S. P., Murphy, J. A., Nordh, L. H., Olberg, M., Ossenkopf, V., Pagani, L., Perault, M., Phillips, T. G., Plume, R., Qin, S. -L., Salez, M., Samoska, L. A., Schilke, P., Schlecht, E., Schlemmer, S., Szczerba, R., Stutzki, J., Trappe, N., van der Tak, F. F. S., Vastel, C., Wang, S., Yorke, H. W., Zmuidzinas, J., Boogert, A., Guesten, R., Hartogh, P., Honingh, N., Karpov, A., Kooi, J., Krieg, J. -M., Schieder, R. and Zaal, P. (2010). Detection of OH+ and H2O+ towards Orion KL. Astron. Astrophys., 521. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 0004-6361

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Abstract

We report observations of the reactive molecular ions OH+, H2O+, and H3O+ towards Orion KL with Herschel/HIFI. All three N = 1-0 fine-structure transitions of OH+ at 909, 971, and 1033 GHz and both fine-structure components of the doublet ortho-H2O+ 1(11)-0(00) transition at 1115 and 1139 GHz were detected; an upper limit was obtained for H3O+, OH+ and H2O+ are observed purely in absorption, showing a narrow component at the source velocity of 9 km s(-1), and a broad blueshifted absorption similar to that reported recently for HF and para-(H2O)-O-18, and attributed to the low velocity outflow of Orion KL. We estimate column densities of OH+ and H2O+ for the 9 km s(-1) component of 9 +/- 3x10(12) cm(-2) and 7 +/- 2x10(12) cm(-2), and those in the outflow of 1.9 +/- 0.7x10(13) cm(-2) and 1.0 +/- 0.3x10(13) cm(-2). Upper limits of 2.4x10(12) cm(-2) and 8.7x10(12) cm(-2) were derived for the column densities of ortho and para-H3O+ from transitions near 985 and 1657 GHz. The column densities of the three ions are up to an order of magnitude lower than those obtained from recent observations of W31C and W49N. The comparatively low column densities may be explained by a higher gas density despite the assumption of a very high ionization rate.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Gupta, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rimmer, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pearson, J. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Yu, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Herbst, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Harada, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bergin, E. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Neufeld, D. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Melnick, G. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bachiller, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Baechtold, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bell, T. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Blake, G. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Caux, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ceccarelli, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cernicharo, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chattopadhyay, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Comito, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cabrit, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Crockett, N. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Daniel, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Falgarone, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Diez-Gonzalez, M. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dubernet, M. -L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Erickson, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Emprechtinger, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Encrenaz, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gerin, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gill, J. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Giesen, T. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Goicoechea, J. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Goldsmith, P. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Joblin, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Johnstone, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Langer, W. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Larsson, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Latter, W. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lin, R. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lis, D. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Liseau, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lord, S. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Maiwald, F. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Maret, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Martin, P. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Martin-Pintado, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Menten, K. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Morris, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, H. S. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Murphy, J. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nordh, L. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Olberg, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ossenkopf, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pagani, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Perault, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Phillips, T. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Plume, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Qin, S. -L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Salez, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Samoska, L. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schilke, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schlecht, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schlemmer, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Szczerba, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stutzki, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Trappe, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED van der Tak, F. F. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vastel, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Yorke, H. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zmuidzinas, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Boogert, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Guesten, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hartogh, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Honingh, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Karpov, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kooi, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Krieg, J. -M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schieder, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zaal, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-494836
DOI:	10.1051/0004-6361/201015117
Journal or Publication Title:	Astron. Astrophys.
Volume:	521
Date:	2010
Publisher:	EDP SCIENCES S A
Place of Publication:	LES ULIS CEDEX A
ISSN:	0004-6361
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LASER MAGNETIC-RESONANCE; HERSCHEL OBSERVATIONS; INTERSTELLAR H3O+; STAR-FORMATION; DIFFUSE CLOUDS; COMET-KOHOUTEK; NEBULA; LINE; REGION; SPECTROSCOPY Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49483