A simple model to interpret the ultraviolet, optical and infrared SEDs of galaxies - Astrophysics > Cosmology and Nongalactic AstrophysicsReport as inadecuate




A simple model to interpret the ultraviolet, optical and infrared SEDs of galaxies - Astrophysics > Cosmology and Nongalactic Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We present a simple, largely empirical but physically motivated model, whichis designed to interpret consistently multi-wavelength observations from largesamples of galaxies in terms of physical parameters, such as star formationrate, stellar mass and dust content. Our model is both simple and versatileenough to allow the derivation of statistical constraints on the star formationhistories and dust contents of large samples of galaxies using a wide range ofultraviolet, optical and infrared observations. We illustrate this by derivingmedian-likelihood estimates of a set of physical parameters describing thestellar and dust contents of local star-forming galaxies from the SpitzerInfrared Nearby Galaxy Sample SINGS and from a newly-matched sample of SDSSgalaxies observed with GALEX, 2MASS, and IRAS. The model reproduces well theobserved spectral energy distributions of these galaxies across the entirewavelength range from the far-ultraviolet to the far-infrared. We findimportant correlations between the physical parameters of galaxies which areuseful to investigate the star formation activity and dust properties ofgalaxies. Our model can be straightforwardly applied to interpret observedultraviolet-to-infrared spectral energy distributions SEDs from any galaxysample.



Author: Elisabete da Cunha University of Crete Stephane Charlot IAP David Elbaz CEA - Saclay

Source: https://arxiv.org/



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