Extinction Radial Profiles of M83 from GALEX Ultraviolet Imaging
The Astrophysical Journal2005Vol. 619(1), pp. L83–L86
Citations Over TimeTop 10% of 2005 papers
S. Boissier, A. Gil de Paz, Barry F. Madore, Alessandro Boselli, V. Buat, Denis Burgarella, Peter G. Friedman, Tom A. Barlow, L. Bianchi, Yong-Ik Byun, J. Donas, Karl Förster, Timothy M. Heckman, Patrick N. Jelinsky, Young‐Wook Lee, Roger F. Malina, D. Christopher Martin, Bruno Milliard, Patrick Morrissey, Susan G. Neff, R. Michael Rich, David Schiminovich, O. Siegmund, Todd Small, Alexander S. Szalay, Barry Y. Welsh, Ted K. Wyder
Abstract
We use the far-UV (FUV) and near-UV images of M83 obtained by the Galaxy Evolution Explorer (GALEX) to compute the radial profile of the UV spectral slope in the star-forming disk. We briefly present a model of its chemical evolution, which allows us to obtain realistic intrinsic properties of the stellar populations. Using corollary data, we also compute the profiles of Ha/Hb and total-IR/FUV ratios. Both the data and model are used to estimate and compare the extinction gradients at the FUV wavelength obtained from these various indicators. We discuss the implications for the determination of the star formation rate.
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