The identification of dust heating mechanisms in nearby galaxies using Herschel 160/250 and 250/350μm surface brightness ratios
- Bendo, G. J.
- Baes, M.
- Bianchi, S.
- Boquien, M.
- Boselli, A.
- Cooray, A.
- Cortese, L.
- De Looze, I.
- di Serego Alighieri, S.
- Fritz, J.
- Gentile, G.
- Hughes, T. M.
- Lu, N.
- Pappalardo, C.
- Smith, Matthew
- Spinoglio, L.
- Viaene, S.
- Vlahakis, C.
DOIAbstract
We examined variations in the 160/250 and 250/350 µm surface brightness ratios within 24 nearby (<30 Mpc) face-on spiral galaxies observed with the Herschel Space Observatory to identify the heating mechanisms for dust emitting at these wavelengths. The analysis consisted of both qualitative and quantitative comparisons of the 160/250 and 250/350 µm ratios to Hα and 24 µm emission, which trace the light from star-forming regions, and 3.6 µm emission, which traces the light from the older stellar populations of the galaxies. We find broad variations in the heating mechanisms for the dust. In one subset of galaxies, we found evidence that emission at ≤160 µm (and in rare cases potentially at ≤350 µm) originates from dust heated by sta...
Add to ORKG