The radial extinction profiles of late-type galaxies

Details The radial extinction profiles of late-type galaxies The radial extinction profiles of late-type galaxies

2004-07-29

arxiv.org/abs/astro-ph/0407617v1

Astron.Astrophys. 424 (2004) 465-476

Astronomy and Astrophysics

Astrophysics

17 pages, 13 figures (higher resolution images available on request). Accepted in A&A (in press)

Scientific paper

10.1051/0004-6361:20047024

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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