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The Herschel M 33 e...
The Herschel M 33 extended survey (HerM33es): PACS spectroscopy of the star-forming region BCLMP 302
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- Mookerjea, B. (författare)
- Tata Institute of Fundamental Research
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- Kramer, C. (författare)
- Institut de Radioastronomie Millimétrique (IRAM)
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- Buchbender, C. (författare)
- Institut de Radioastronomie Millimétrique (IRAM)
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- Boquien, M. (författare)
- University of Massachusetts
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- Verley, S. (författare)
- Universidad de Granada
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- Relano, M. (författare)
- Universidad de Granada
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- Quintana-Lacaci, G. (författare)
- Institut de Radioastronomie Millimétrique (IRAM)
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- Aalto, Susanne, 1964 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Braine, J. (författare)
- Laboratoire d'Astrophysique de Bordeaux
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- Calzetti, D. (författare)
- University of Massachusetts
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- Combes, F. (författare)
- Centre national de la recherche scientifique (CNRS)
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Burillo, S. G. (författare)
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- Gratier, P. (författare)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Henkel, C. (författare)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Israel, F. P. (författare)
- Universiteit Leiden (UL),Leiden University (UL)
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- Lord, S. (författare)
- California Institute of Technology (Caltech)
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- Nikola, T. (författare)
- Cornell University
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- Rollig, M. (författare)
- University Of Cambridge,Universität zu Köln,University of Cologne
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- Stacey, G. (författare)
- Cornell University
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- Tabatabaei, F. (författare)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- van der Tak, F. F. S. (författare)
- Netherlands Institute for Space Research (SRON)
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- van der Werf, P. (författare)
- University of Edinburgh,Universiteit Leiden (UL),Leiden University (UL)
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(creator_code:org_t)
- 2011-08-09
- 2011
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 532, s. art. no. A152-
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Abstract
Ämnesord
Stäng
- Context. The emission line of [CII] at 158 mu m is one of the strongest cooling lines of the interstellar medium (ISM) in galaxies. Aims. Distinguishing the relative contributions of the different ISM phases to [CII] emission is a major objective of the HerM33es program, a Herschel key project to study the ISM in the nearby spiral galaxy M 33. Methods. Using PACS, we have mapped the emission of [CII] 158 mu m, [OI] 63 mu m, and other FIR lines in a 2' x 2' region of the northern spiral arm of M 33, centered on the HII region BCLMP302. At the peak of Ha emission, we observed in addition a velocity-resolved [CII] spectrum using HIFI. We use scatterplots to compare these data with PACS 160 mu m continuum maps, and with maps of CO and HI data, at a common resolution of 12 '' or 50 pc. Maps of Ha and 24 mu m emission observed with Spitzer are used to estimate the SFR. We created maps of the [CII] and [OI] 63 mu m emission and detected [NII] 122 mu m and [NIII] 57 mu m at individual positions. Results. The [CII] line observed with HIFI is significantly broader than that of CO, and slightly blue-shifted. In addition, there is little spatial correlation between [CII] observed with PACS and CO over the mapped region. There is even less spatial correlation between [CII] and the atomic gas traced by HI. Detailed comparison of the observed intensities towards the HII region with models of photo-ionization and photon-dominated regions, confirms that a significant fraction, 20-30%, of the observed [CII] emission stems from the ionized gas and not from the molecular cloud. The gas heating efficiency, using the ratio of [CII] to the TIR as a proxy, varies between 0.07 and 1.5%, with the largest variations found outside the HII region.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- long-wavelength spectrometer
- nearby galaxies
- herm33es
- photodissociation regions
- m emission
- galaxies
- interstellar-medium
- conditions
- photon-dominated regions
- star formation
- HII regions
- h-ii regions
- M 33
- physical
- photon-dominated region (PDR)
- m33
- far-infrared spectroscopy
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Till lärosätets databas
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Mookerjea, B.
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Kramer, C.
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Buchbender, C.
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Boquien, M.
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Verley, S.
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Relano, M.
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visa fler...
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Quintana-Lacaci, ...
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Aalto, Susanne, ...
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Braine, J.
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Calzetti, D.
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Combes, F.
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Burillo, S. G.
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Gratier, P.
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Henkel, C.
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Israel, F. P.
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Lord, S.
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Nikola, T.
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Rollig, M.
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Stacey, G.
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Tabatabaei, F.
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van der Tak, F. ...
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van der Werf, P.
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