Extinction radial profiles of M83 from GALEX ultraviolet imaging

被引：37
作者：
Boissier, S
de Paz, AG
Madore, BF
Boselli, A
Buat, V
Burgarella, D
Friedman, PG
Barlow, TA
Bianchi, L
Byun, YI
Donas, J
Forster, K
Heckman, TM
Jelinsky, PN
Lee, YW
Malina, RF
Martin, DC
Milliard, B
Morrissey, P
Neff, SG
Rich, RM
Schiminovich, D
Siegmund, OHW
Small, T
Szalay, AS
Welsh, BY
Wyder, TK
机构：
[1] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA
[2] Lab Astrophys Marseille, F-13376 Marseille 12, France
[3] CALTECH, Pasadena, CA 91125 USA
[4] Johns Hopkins Univ, Ctr Astrophys Sci, Baltimore, MD 21218 USA
[5] Yonsei Univ, Ctr Space Astrophys, Seoul 120749, South Korea
[6] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
[7] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
[8] NASA, Goddard Space Flight Ctr, Astron & Solar Phys Lab, Greenbelt, MD 20771 USA
[9] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
来源：
ASTROPHYSICAL JOURNAL | 2005年 / 619卷 / 01期
关键词：
dust; extinction; galaxies : individual (M83); ultraviolet : galaxies;
D O I：
10.1086/423668
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 Halpha/Hbeta 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.
引用
收藏
页码：L83 / L86
页数：4
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