Boselli, A. and Bock, J. and Bradford, M. and Fadda, D. and Levenson, L. and Lu, N. and Schulz, B. and Wright, G. (2010) FIR colours and SEDs of nearby galaxies observed with Herschel. Astronomy and Astrophysics, 518 . Art. No. L61. ISSN 0004-6361 http://resolver.caltech.edu/CaltechAUTHORS:20101130-162459328
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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.
|Additional Information:||© 2010 ESO. Received 29 March 2010, Accepted 9 April 2010, Published online 16 July 2010. Herschel is an ESA space observatory with science instruments provided by Principal Investigator consortia. It is open for proposals for observing time from the worldwide astronomical community. SPIRE has been developed by a consortium of institutes led by Cardiff University (UK) and including Univ. Lethbridge (Canada); NAOC (China); CEA, LAM (France); IFSI, Univ. Padua (Italy); IAC (Spain); Stockholm Observatory (Sweden); Imperial College London, RAL, UCLMSSL, UKATC, Univ. Sussex (UK); and Caltech/JPL, IPAC, Univ. Colorado (USA). This development has been supported by national funding agencies: CSA (Canada); NAOC (China); CEA, CNES, CNRS (France); ASI (Italy); MCINN (Spain); Stockholm Observatory (Sweden); STFC (UK); and NASA (USA).|
|Subject Keywords:||galaxies: ISM, galaxies: spiral, galaxies: elliptical and lenticular, cD, infrared: galaxies|
|Official Citation:||FIR colours and SEDs of nearby galaxies observed with Herschel A. Boselli, L. Ciesla, V. Buat, L. Cortese, R. Auld, M. Baes, G. J. Bendo, S. Bianchi, J. Bock, D. J. Bomans, M. Bradford, N. Castro-Rodriguez, P. Chanial, S. Charlot, M. Clemens, D. Clements, E. Corbelli, A. Cooray, D. Cormier, A. Dariush, J. Davies, I. De Looze, S. di Serego Alighieri, E. Dwek, S. Eales, D. Elbaz, D. Fadda, J. Fritz, M. Galametz, F. Galliano, D. A. Garcia-Appadoo, G. Gavazzi, W. Gear, C. Giovanardi, J. Glenn, H. Gomez, M. Griffin, M. Grossi, S. Hony, T. M. Hughes, L. Hunt, K. Isaak, A. Jones, L. Levenson, N. Lu, S. C. Madden, B. O'Halloran, K. Okumura, S. Oliver, M. Page, P. Panuzzo, A. Papageorgiou, T. Parkin, I. Perez-Fournon, D. Pierini, M. Pohlen, N. Rangwala, E. Rigby, H. Roussel, A. Rykala, S. Sabatini, N. Sacchi, M. Sauvage, B. Schulz, M. Schirm, M. W. L. Smith, L. Spinoglio, J. Stevens, S. Sundar, M. Symeonidis, M. Trichas, M. Vaccari, J. Verstappen, L. Vigroux, C. Vlahakis, C. Wilson, H. Wozniak, G. Wright, E. M. Xilouris, W. Zeilinger and S. Zibetti A&A 518 L61 (2010) DOI: 10.1051/0004-6361/201014534|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Benjamin Perez|
|Deposited On:||01 Dec 2010 17:21|
|Last Modified:||26 Dec 2012 12:42|
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