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FIR colours and SEDs of nearby galaxies observed with Herschel

Boselli, A., Ciesla, L., Buat, V., Cortese, Luca, Auld, Robbie Richard, Baes, M., Bendo, G. J., Bianchi, S., Bock, J., Bomans, D. J., Bradford, M., Castro-Rodriguez, N., Chanial, P., Charlot, S., Clemens, M., Clements, D., Corbelli, E., Cooray, A., Cormier, D., Dariush, Aliakbar, Davies, Jonathan Ivor, De Looze, I., di Serego Alighieri, S., Dwek, E., Eales, Stephen Anthony, Elbaz, D., Fadda, D., Fritz, J., Galametz, M., Galliano, F., Garcia-Appadoo, D. A., Gavazzi, G., Gear, Walter Kieran, Giovanardi, C., Glenn, J., Gomez, Haley Louise, Griffin, Matthew Joseph, Grossi, M., Hony, S., Hughes, Thomas Marcus, Hunt, L., Isaak, Kate Gudrun, Jones, A., Levenson, L., Lu, N., Madden, S. C., O'Halloran, B., Okumura, K., Oliver, S., Page, M., Panuzzo, P., Papageorgiou, Andreas, Parkin, T., Perez-Fournon, I., Pierini, D., Pohlen, Michael, Rangwala, N., Rigby, E., Roussel, H., Rykala, Adam John, Sabatini, S., Sacchi, N., Sauvage, M., Schulz, B., Schirm, M., Smith, Matthew W., Spinoglio, L., Stevens, J., Sundar, S., Symeonidis, M., Trichas, M., Vaccari, M., Verstappen, J., Vigroux, L., Vlahakis, C., Wilson, C., Wozniak, H., Wright, G., Xilouris, E. M., Zeilinger, W. and Zibetti, S. 2010. FIR colours and SEDs of nearby galaxies observed with Herschel. Astronomy and Astrophysics 518 , L61. 10.1051/0004-6361/201014534

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We present infrared colours (in the 25–500 μm spectral range) and UV to radio continuum spectral energy distributions of a sample of 51 nearby galaxies observed with SPIRE on Herschel. The observed sample includes all morphological classes, from quiescent ellipticals to active starbursts. Active galaxies have warmer colour temperatures than normal spirals. In ellipticals hosting a radio galaxy, the far-infrared (FIR) emission is dominated by the synchrotron nuclear emission. The colour temperature of the cold dust is higher in quiescent E-S0a than in star-forming systems probably because of the different nature of their dust heating sources (evolved stellar populations, X-ray, fast electrons) and dust grain properties. In contrast to the colour temperature of the warm dust, the f350/f500 index sensitive to the cold dust decreases with star formation and increases with metallicity, suggesting an overabundance of cold dust or an emissivity parameter β < 2 in low metallicity, active systems.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: galaxies: ISM / galaxies: spiral / galaxies: elliptical and lenticular, cD / infrared: galaxies
Publisher: EDP Sciences
ISSN: 0004-6361
Last Modified: 03 Jul 2018 22:08

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