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A Multi-wavelength MOCASSIN model of the Magellanic-type galaxy NGC 4449

Published online by Cambridge University Press:  17 August 2012

O. Ł. Karczewski ,
M. J. Barlow ,
M. J. Page  and
S. C. Madden
O. Ł. Karczewski
Affiliation:
Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK e-mail: olk@star.ucl.ac.uk
M. J. Barlow
Affiliation:
Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK e-mail: olk@star.ucl.ac.uk
M. J. Page
Affiliation:
Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, RH5 6NT, UK
S. C. Madden
Affiliation:
CEA Saclay Service d'Astrophysique, L'Orme des Merisiers Bat 709, 91191 Gif-sur-Yvette Cedex, France
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Abstract

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We use the photoionisation and dust radiative transfer code MOCASSIN to create a model of the dwarf irregular galaxy NGC 4449. The best-matching model reproduces the global optical emission line fluxes and the observed spectral energy distribution (SED) spanning wavelengths from the UV to sub-mm, and requires the bolometric luminosity of 6.25 × 109L⊙ for the underlying stellar component, Mdust/Mgas of 1/680 and Mdust of 2.2 × 106M⊙.

Keywords

dustextinctiongalaxies: dwarfgalaxies: generalgalaxies: individual (NGC 4449)galaxies: stellar contentmethods: numerical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S284: The Spectral Energy Distribution of Galaxies , September 2011 , pp. 159 - 162
Copyright
Copyright © International Astronomical Union 2012

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