期刊
ASTRONOMY & ASTROPHYSICS
卷 424, 期 2, 页码 465-476出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20047024
关键词
galaxies : spiral; ultraviolet : galaxies; ISM : dust, extinction
We have used UV (FOCA) and FIR (IRAS) images of six nearby late type galaxies to study the radial variation of the UV extinction (deduced from the FIR/UV ratio). We compare the UV extinction gradient with other extinction indicators (Balmer decrement) and search for a relation between the extinction, the metallicity and the gas surface density among our galaxies. We detect in our small sample a clear relation between extinction and metallicity. These observed relations are used to calibrate an empirical recipe useful for extinction correction in the UV, visible and near-infrared images of late type galaxies.
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