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  • HERSCHEL FAR-INFRARED AND S...
    DALE, D. A; ANIANO, G; BOLATTO, A. D; BRANDL, B. R; CALZETTI, D; CROCKER, A. F; CROXALL, K. V; DRAINE, B. T; GALAMETZ, M; GORDON, K. D; GROVES, B. A; HAO, C.-N; ENGELBRACHT, C. W; HELOU, G; HUNT, L. K; JOHNSON, B. D; KENNICUTT, R. C; KODA, J; LEROY, A. K; LI, Y; MEIDT, S. E; MILLER, A. E; MURPHY, E. J; HINZ, J. L; RAHMAN, N; RIX, H.-W; SANDSTROM, K. M; SAUVAGE, M; SCHINNERER, E; SKIBBA, R. A; SMITH, J.-D. T; TABATABAEI, F. S; WALTER, F; WILSON, C. D; KRAUSE, O; WOLFIRE, M. G; ZIBETTI, S; MONTIEL, E. J; ROUSSEL, H; APPLETON, P. N; ARMUS, L; BEIRAO, P

    The Astrophysical journal, 01/2012, Letnik: 745, Številka: 1
    Journal Article

    New far-infrared and submillimeter photometry from the Herschel Space Observatory is presented for 61 nearby galaxies from the Key Insights on Nearby Galaxies: A Far-Infrared Survey with Herschel (KINGFISH) sample. The spatially integrated fluxes are largely consistent with expectations based on Spitzer far-infrared photometry and extrapolations to longer wavelengths using popular dust emission models. Dwarf irregular galaxies are notable exceptions, as already noted by other authors, as their 500 mu m emission shows evidence for a submillimeter excess. In addition, the fraction of dust heating attributed to intense radiation fields associated with photodissociation regions is found to be (21 + or - 4)% larger when Herschel data are included in the analysis. Dust masses obtained from the dust emission models of Draine & Li are found to be on average nearly a factor of two higher than those based on single-temperature modified blackbodies, as single blackbody curves do not capture the full range of dust temperatures inherent to any galaxy. The discrepancy is largest for galaxies exhibiting the coolest far-infrared colors.