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Extinction radial profiles of M83 from GALEX ultraviolet imaging

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Gil de Paz, Armando and otros, ... (2005) Extinction radial profiles of M83 from GALEX ultraviolet imaging. Astrophysical journal, 619 (1). L83-L86. ISSN 0004-637X

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Official URL: http://dx.doi.org/10.1086/423668




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 Hα/Hβ 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.


Item Type:Article
Additional Information:

© 2005. The American Astronomical Society. All rights reserved. Artículo firmado por 27 autores. GALEX (Galaxy Evolution Explorer) is a NASA small explorer launched in 2003 April. We gratefully acknowledge NASA’s support for construction, operation, and science analysis for the GALEX mission, developed in cooperation with the Centre National d’Etudes Spatiales of France and the Korean Ministry of Science and Technology. We thank C. Popescu and R. Tuffs for their comments. S. B. thanks the CNES for its financial support.

Uncontrolled Keywords:Spectral energy-distribution; Star-formation history; Starburst galaxies; Forming galaxies; Disc galaxies; Dust content; Gas; NGC-891
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:35972
Deposited On:26 Feb 2016 14:54
Last Modified:10 Dec 2018 15:05

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