Dedes, C., Roellig, M., Mookerjea, B., Okada, Y., Ossenkopf, V., Bruderer, S., Benz, A. O., Melchior, M., Kramer, C., Gerin, M., Guesten, R., Akyilmaz, M., Berne, O., Boulanger, F., De lange, G., Dubbeldam, L., France, K., Fuente, A., Goicoechea, J. R., Harris, A., Huisman, R., Jellema, W., Joblin, C., Klein, T., Le Petit, F., Lord, S., Martin, P., Martin-Pintado, J., Neufeld, D. A., Philipp, S., Phillips, T., Pilleri, P., Rizzo, J. R., Salez, M., Schieder, R., Simon, R., Siebertz, O., Stutzki, J., van der Tak, F., Teyssier, D. and Yorke, H. (2010). The origin of the [CII] emission in the S140 photon-dominated regions. New insights from HFI. Astron. Astrophys., 521. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 0004-6361

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Abstract

Using Herschel's HIFI instrument, we observe [Cii] along a cut through S140, as well as high-J transitions of CO and HCO+ at two positions on the cut, corresponding to the externally irradiated ionization front and the embedded massive star-forming core IRS1. The HIFI data were combined with available ground-based observations and modeled using the KOSMA-t model for photon-dominated regions ( PDRs). We derive the physical conditions in S140 and in particular the origin of [C ii] emission around IRS1. We identify three distinct regions of [Cii] emission from the cut, one close to the embedded source IRS1, one associated with the ionization front, and one further into the cloud. The line emission can be understood in terms of a clumpy model of PDRs. At the position of IRS1, we identify at least two distinct components contributing to the [C ii] emission, one of them a small, hot component, which can possibly be identified with the irradiated outflow walls. This is consistent with the [C ii] peak at IRS1 coinciding with shocked H2 emission at the edges of the outflow cavity. We note that previously available observations of IRS1 can be reproduced well by a single-component KOSMA-t model. Thus, it is HIFI's unprecedented spatial and spectral resolution, as well as its sensitivity that has allowed us to uncover an additional hot gas component in the S140 region.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Dedes, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Roellig, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mookerjea, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Okada, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ossenkopf, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bruderer, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benz, A. O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Melchior, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kramer, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gerin, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guesten, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Akyilmaz, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Berne, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Boulanger, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
De lange, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dubbeldam, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
France, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fuente, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goicoechea, J. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Harris, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Huisman, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jellema, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Joblin, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Klein, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Le Petit, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lord, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Martin, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Martin-Pintado, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Neufeld, D. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Philipp, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Phillips, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pilleri, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rizzo, J. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Salez, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schieder, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Simon, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Siebertz, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stutzki, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van der Tak, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Teyssier, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yorke, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-494783
DOI: 10.1051/0004-6361/201015099
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; MOLECULAR CLOUDS; MASS-SPECTRA; S 140; OUTFLOW; CARBON; S-140/L-1204; S140-IRS-1; CONTINUUM; FIELDSMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/49478

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