Journal
ASTROPHYSICAL JOURNAL
Volume 756, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/756/1/75
Keywords
galaxies: individual (NGC 1291); galaxies: photometry; galaxies: spiral
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Funding
- CSA in Canada
- NAOC in China
- CNES in France
- CNRS in France
- CEA in France
- ASI in Italy
- MCINN in Spain
- Stockholm Observatory in Sweden
- STFC in the UK
- NASA in the U.S.A
- ESA
- STFC [ST/J001538/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001538/1, ST/H00243X/1] Funding Source: researchfish
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We examine Herschel Space Observatory images of one nearby prototypical outer ring galaxy, NGC 1291, and show that the ring becomes more prominent at wavelengths longer than 160 mu m. The mass of cool dust in the ring dominates the total dust mass of the galaxy, accounting for at least 70% of it. The temperature of the emitting dust in the ring (T = 19.5 +/- 0.3 K) is cooler than that of the inner galaxy (T = 25.7 +/- 0.7 K). We discuss several explanations for the difference in dust temperature, including age and density differences in the stellar populations of the ring versus the bulge.
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