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Herschel-ATLAS: the dust energy balance in the edge-on spiral galaxy UGC 4754

Baes, M.; Fritz, J.; Gadotti, D. A.; Smith, D. J. B.; Dunne, L.; da Cunha, E.; Amblard, A.; Auld, R.; Bendo, G. J.; Bonfield, D.; Burgarella, D.; Buttiglione, S.; Cava, A.; Clements, D.; Cooray, A.; Dariush, A.; de Zotti, G.; Dye, S.; Eales, S.; Frayer, D.; Gonzalez-Nuevo, J.; Herranz, D.; Ibar, E.; Ivison, R.; Lagache, G.; Leeuw, L.; Lopez-Caniego, M.; Jarvis, M.; Maddox, S.; Negrello, M.; Michałowski, M.; Pascale, E.; Pohlen, M.; Rigby, E.; Rodighiero, G.; Samui, S.; Serjeant, S.; Temi, P.; Thompson, M.; van der Werf, P.; Verma, A. and Vlahakis, C. (2010). Herschel-ATLAS: the dust energy balance in the edge-on spiral galaxy UGC 4754. Astronomy and Astrophysics, 518 L39/1-L39/5.

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DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1051/0004-6361/201014644
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Abstract

We use Herschel PACS and SPIRE observations of the edge-on spiral galaxy UGC4754, taken as part of the H-ATLAS SDP observations, to investigate the dust energy balance in this galaxy. We build detailed SKIRT radiative models based on SDSS and UKIDSS maps and use these models to predict the far-infrared emission. We find that our radiative transfer model underestimates the observed FIR emission by a factor of two to three. Similar discrepancies have been found for other edge-on spiral galaxies based on IRAS, ISO, and SCUBA data. Thanks to the good sampling of the SED at FIR wavelengths, we can rule out an underestimation of the FIR emissivity as the cause for this discrepancy. Instead we support highly obscured star formation that contributes little to the optical extinction as a more probable explanation.

Item Type: Journal Article
Copyright Holders: 2010 ESO
ISSN: 1432-0746
Keywords: radiative transfer; dust; extinction; galaxies; infrared
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 25173
Depositing User: Astrid Peterkin
Date Deposited: 08 Dec 2010 10:53
Last Modified: 26 Nov 2012 18:20
URI: http://oro.open.ac.uk/id/eprint/25173
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