Kama, M., Dominik, C., Maret, S., van der Tak, F., Caux, E., Ceccarelli, C., Fuente, A., Crimier, N., Lord, S., Bacmann, A., Baudry, A., Bell, T., Benedettini, M., Bergin, E. A., Blake, G. A., Boogert, A., Bottinelli, S., Cabrit, S., Caselli, P., Castets, A., Cernicharo, J., Codella, C., Comito, C., Coutens, A., Demyk, K., Encrenaz, P., Falgarone, E., Gerin, M., Goldsmith, P. F., Helmich, F., Hennebelle, P., Henning, T., Herbst, E., Hily-Blant, P., Jacq, T., Kahane, C., Klotz, A., Langer, W., Lefloch, B., Lis, D., Lorenzani, A., Melnick, G., Nisini, B., Pacheco, S., Pagani, L., Parise, B., Pearson, J., Phillips, T., Salez, M., Saraceno, P., Schilke, P., Schuster, K., Tielens, X., van der Wiel, M. H. D., Vastel, C., Viti, S., Wakelam, V., Walters, A., Wyrowski, F., Yorke, H., Cais, P., Guesten, R., Philipp, S., Klein, T. and Helmich, F. (2010). The methanol lines and hot core of OMC2-FIR4, an intermediate-mass protostar, with Herschel/HIFI. Astron. Astrophys., 521. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 0004-6361

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Abstract

In contrast with numerous studies on the physical and chemical structure of low-and high-mass protostars, much less is known about their intermediate-mass counterparts, a class of objects that could help to elucidate the mechanisms of star formation on both ends of the mass range. We present the first results from a rich HIFI spectral dataset on an intermediate-mass protostar, OMC2-FIR4, obtained in the CHESS (Chemical HErschel Survey of Star forming regions) key programme. The more than 100 methanol lines detected between 554 and 961 GHz cover a range in upper level energy of 40 to 540 K. Our physical interpretation focusses on the hot core, but likely the cold envelope and shocked regions also play a role in reality, because an analysis of the line profiles suggests the presence of multiple emission components. An upper limit of 10 (6) is placed on the methanol abundance in the hot core, using a population diagram, large-scale source model and other considerations. This value is consistent with abundances previously seen in low-mass hot cores. Furthermore, the highest energy lines at the highest frequencies display asymmetric profiles, which may arise from infall around the hot core.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Kama, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dominik, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Maret, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van der Tak, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Caux, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ceccarelli, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fuente, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Crimier, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lord, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bacmann, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Baudry, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bell, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benedettini, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bergin, E. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blake, G. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Boogert, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bottinelli, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cabrit, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Caselli, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Castets, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cernicharo, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Codella, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Comito, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Coutens, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Demyk, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Encrenaz, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Falgarone, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gerin, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goldsmith, P. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Helmich, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hennebelle, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Henning, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Herbst, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hily-Blant, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jacq, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kahane, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Klotz, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Langer, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lefloch, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lis, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lorenzani, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Melnick, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nisini, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pacheco, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pagani, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Parise, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pearson, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Phillips, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Salez, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Saraceno, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schilke, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schuster, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tielens, X.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van der Wiel, M. H. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vastel, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Viti, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wakelam, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Walters, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wyrowski, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yorke, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cais, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guesten, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Philipp, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Klein, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Helmich, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-494902
DOI: 10.1051/0004-6361/201015118
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:
KeywordsLanguage
STAR-FORMING REGIONS; INTERSTELLAR CLOUDS; PACS SPECTROSCOPY; DIAGNOSTIC-TOOL; GAS; EXPLANATION; ENVELOPES; MOLECULES; ABUNDANCE; EMISSIONMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/49490

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