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MAGPHYS: a publicly available tool to interpret observed galaxy SEDs

Published online by Cambridge University Press:  17 August 2012

Elisabete da Cunha ,
Stéphane Charlot ,
Loretta Dunne ,
Dan Smith  and
Kate Rowlands
Elisabete da Cunha
Affiliation:
Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany email: [email protected]
Stéphane Charlot
Affiliation:
UPMC Univ. Paris 6/CNRS, UMR 7095, Institut d'Astrophysique de Paris, France
Loretta Dunne
Affiliation:
School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 2RD, UK
Dan Smith
Affiliation:
Centre for Astrophysics, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts, AL10 9AB, UK
Kate Rowlands
Affiliation:
School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 2RD, UK
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Abstract

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We present a simple, physically-motivated model to interpret consistently the emission from galaxies at ultraviolet, optical and infrared wavelengths. We combine this model with a Bayesian method to obtain robust statistical constraints on key parameters describing the stellar content, star formation activity and dust content of galaxies. Our model is now publicly available via a user-friendly code package, MAGPHYS at www.iap.fr/magphys. We present an application of this model to interpret a sample of ~1400 local (z<0.5) galaxies from the H-ATLAS survey. We find that, for these galaxies, the diffuse interstellar medium, powered mainly by stars older than 10 Myr, accounts for about half the total infrared luminosity. We discuss the implications of this result to the use of star formation rate indicators based on total infrared luminosity.

Keywords

dustextinction galaxies: ISM galaxies: stellar content galaxies: statistics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S284: The Spectral Energy Distribution of Galaxies , September 2011 , pp. 292 - 296
Copyright
Copyright © International Astronomical Union 2012

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