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Investigations of dust heating in M81, M83 and NGC 2403 with the Herschel Space Observatory

Bendo, GJ; Boselli, A; Dariush, A; Pohlen, M; Roussel, H; Sauvage, M; Smith, MWL; ... Spinoglio, L; + view all (2012) Investigations of dust heating in M81, M83 and NGC 2403 with the Herschel Space Observatory. Monthly Notices of the Royal Astronomical Society , 419 (3) 1833 - 1859. 10.1111/j.1365-2966.2011.19735.x. Green open access

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Abstract

We use Spitzer Space Telescope and Herschel Space Observatory far-infrared data along with ground-based optical and near-infrared data to understand how dust heating in the nearby face-on spiral galaxies M81, M83 and NGC 2403 is affected by the starlight from all stars and by the radiation from star-forming regions. We find that 70/160 m surface brightness ratios tend to be more strongly influenced by star-forming regions. However, the 250/350 m and 350/500 m surface brightness ratios are more strongly affected by the light from the total stellar populations, suggesting that the dust emission at >250 m originates predominantly from a component that is colder than the dust seen at <160 m and that is relatively unaffected by star formation activity. We conclude by discussing the implications of this for modelling the spectral energy distributions of both nearby and more distant galaxies and for using far-infrared dust emission to trace star formation.

Type: Article
Title: Investigations of dust heating in M81, M83 and NGC 2403 with the Herschel Space Observatory
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/j.1365-2966.2011.19735.x
Publisher version: http://dx.doi.org/10.1111/j.1365-2966.2011.19735.x
Language: English
Additional information: © 2012 RAS Definitive versions of articles pre-2013 are available at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2966, now published by http://mnras.oxfordjournals.org
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/1363701
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