Journal
ASTRONOMY & ASTROPHYSICS
Volume 518, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201014568
Keywords
galaxies: ISM; galaxies: spiral; galaxies: individual: M81
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Funding
- CSA (Canada)
- NAOC (China)
- CEA (France)
- CNES (France)
- CNRS (France)
- ASI (Italy)
- MCINN (Spain)
- SNSB (Sweden)
- STFC (UK)
- NASA (USA)
- BMVIT (Austria)
- ESA-PRODEX (Belgium)
- DLR (Germany)
- CICT (Spain)
- MCT (Spain)
- STFC [ST/G002827/1, PP/E001173/1, ST/G002630/1, ST/F002858/1, ST/H001530/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G002630/1, ST/G002827/1, PP/E001173/1, PP/E001181/1, ST/F002858/1] Funding Source: researchfish
- UK Space Agency [ST/G003874/1] Funding Source: researchfish
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We use Herschel Space Observatory data to place observational constraints on the peak and Rayleigh-Jeans slope of dust emission observed at 70-500 mu m in the nearby spiral galaxy M81. We find that the ratios of wave bands between 160 and 500 mu m are primarily dependent on radius but that the ratio of 70 to 160 mu m emission shows no clear dependence on surface brightness or radius. These results along with analyses of the spectral energy distributions imply that the 160-500 mu m emission traces 15-30 K dust heated by evolved stars in the bulge and disc whereas the 70 mu m emission includes dust heated by the active galactic nucleus and young stars in star forming regions.
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