University of Hertfordshire

SED fitting of nearby galaxies in the Herschel Reference Survey

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  • L. Ciesla
  • A. Boselli
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  • M. Vaccari
  • J. Verstappen
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Original languageEnglish
Title of host publicationSF2A-2010: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics
EditorsS Boissier, M Heydari-Malayeri, R Samadi, D Valls-Gabaud
PublisherSociete Francaise d'Astronomie et d'Astrophysique
Pages31-35
Publication statusPublished - 1 Dec 2010
EventAnnual Meeting of the French Society of Astronomy & Astrophysics - Marseille, France
Duration: 21 Jun 201024 Jun 2010

Conference

ConferenceAnnual Meeting of the French Society of Astronomy & Astrophysics
CountryFrance
CityMarseille
Period21/06/1024/06/10

Abstract

We compute UV to radio continuum spectral energy distributions of 51 nearby galaxies recently observed with SPIRE onboard Herschel and present infrared colours (in the 25-500 μm spectral range). SPIRE data of normal galaxies are well reproduced with a modified black body (β=2) of temperature T≅q 20 K. 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.

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