Universität zu Köln

Qin, S. -L., Schilke, P., Comito, C., Moeller, T., Rolffs, R., Mueller, H. S. P., Belloche, A., Menten, K. M., Lis, D. C., Phillips, T. G., Bergin, E. A., Bell, T. A., Crockett, N. R., Blake, G. A., Cabrit, S., Caux, E., Ceccarelli, C., Cernicharo, J., Daniel, F., Dubernet, M. -L., Emprechtinger, M., Encrenaz, P., Falgarone, E., Gerin, M., Giesen, T. F., Goicoechea, J. R., Goldsmith, P. F., Gupta, H., Herbst, E., Joblin, C., Johnstone, D., Langer, W. D., Lord, S. D., Maret, S., Martin, P. G., Melnick, G. J., Morris, P., Murphy, J. A., Neufeld, D. A., Ossenkopf, V., Pagani, L., Pearson, J. C., Perault, M., Plume, R., Salez, M., Schlemmer, S., Stutzki, J., Trappe, N., van der Tak, F. F. S., Vastel, C., Wang, S., Yorke, H. W., Yu, S., Zmuidzinas, J., Boogert, A., Guesten, R., Hartogh, P., Honingh, N., Karpov, A., Kooi, J., Krieg, J. -M., Schieder, R., Diez-Gonzalez, M. C., Bachiller, R., Martin-Pintado, J., Baechtold, W., Olberg, M., Nordh, L. H., Gill, J. L. and Chattopadhyay, G. (2010). Herschel observations of EXtra-Ordinary Sources (HEXOS): detecting spiral arm clouds by CH absorption lines. Astron. Astrophys., 521. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 0004-6361

Full text not available from this repository.

Abstract

We have observed CH absorption lines (J = 3/2, N = 1 <- J = 1/2, N = 1) against the continuum source Sgr B2(M) using the Herschel/HIFI instrument. With the high spectral resolution and wide velocity coverage provided by HIFI, 31 CH absorption features with different radial velocities and line widths are detected and identified. The narrower line width and lower column density clouds show spiral arm cloud characteristics, while the absorption component with the broadest line width and highest column density corresponds to the gas from the Sgr B2 envelope. The observations show that each spiral arm harbors multiple velocity components, indicating that the clouds are not uniform and that they have internal structure. This line-of-sight through almost the entire Galaxy offers unique possibilities to study the basic chemistry of simple molecules in diffuse clouds, as a variety of different cloud classes are sampled simultaneously. We find that the linear relationship between CH and H-2 column densities found at lower AV by UV observations does not continue into the range of higher visual extinction. There, the curve flattens, which probably means that CH is depleted in the denser cores of these clouds.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Qin, S. -L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schilke, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Comito, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Moeller, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rolffs, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, H. S. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Belloche, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Menten, K. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lis, D. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Phillips, T. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bergin, E. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bell, T. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Crockett, N. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Blake, G. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cabrit, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Caux, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ceccarelli, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cernicharo, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Daniel, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dubernet, M. -L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Emprechtinger, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Encrenaz, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Falgarone, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gerin, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Giesen, T. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Goicoechea, J. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Goldsmith, P. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gupta, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Herbst, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Joblin, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Johnstone, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Langer, W. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lord, S. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Maret, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Martin, P. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Melnick, G. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Morris, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Murphy, J. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Neufeld, D. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ossenkopf, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pagani, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pearson, J. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Perault, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Plume, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Salez, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schlemmer, S. 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 Yu, S. 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 Diez-Gonzalez, M. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bachiller, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Martin-Pintado, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Baechtold, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Olberg, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nordh, L. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gill, J. L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chattopadhyay, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-495020
DOI:	10.1051/0004-6361/201015107
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 MOLECULAR CLOUDS; SAGITTARIUS B2; COLOGNE DATABASE; SIGHT-LINE; SUBMILLIMETER; SPECTROSCOPY; G10.6-0.4; CHEMISTRY; MICROWAVE; HYDROGEN Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49502