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
- Wilson, CD
- Baes, Maarten
- Cooray, A
- Clements, DL
- Cortese, L
- Foyle, K
- Galametz, M
- Gomez, HL
- Lebouteiller, V
- Lu, N
- Madden, SC
- Mentuch, E
- O'Halloran, B
- Page, MJ
- Remy, A
- Schulz, B
- Spinoglio, L
DOIAbstract
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 ac...
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