COOL DUST IN THE OUTER RING OF NGC 1291

Journal Article · Sat Sep 01 00:00:00 EDT 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/756/1/75· OSTI ID:22092442

Hinz, J. L.; Engelbracht, C. W.; Skibba, R.; Crocker, A.; Calzetti, D. ^[1]; Donovan Meyer, J. ^[2]; Sandstrom, K.; Walter, F.; Groves, B.; Meidt, S. E. ^[3]; Johnson, B. D. ^[4]; Hunt, L. ^[5]; Aniano, G.; Draine, B.; Murphy, E. J. ^[6]; Armus, L. ^[7]; Dale, D. A. ^[8]; Galametz, M.; Kennicutt, R. C. ^[9]; others, and

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1. Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States)
2. Physics and Astronomy Department, Stony Brook University, Stony Brook, NY 11794-3800 (United States)
3. Max-Planck-Institut fur Astronomie, Konigstuhl 17, D-69117 Heidelberg (Germany)
4. 9 Institut d'Astrophysique de Paris, CNRS, Universite Pierre and Marie Curie, UMR 7095, 98bis bd Arago, F-75014 Paris (France)
5. INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Fireze (Italy)
6. Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States)
7. Spitzer Science Center, California Institute of Technology, Mc 314-6, Pasadena, CA 91125 (United States)
8. Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82071 (United States)
9. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (United Kingdom)

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.

• OSTI ID: 22092442
• Journal Information: Astrophysical Journal, Vol. 756, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCOUNTING
ASTRONOMY
ASTROPHYSICS
COSMIC DUST
DENSITY
GALAXIES
IMAGES
MASS
PHOTOMETRY
SPACE
STARS
WAVELENGTHS