The radial extinction profiles of late-type galaxies*
Carnegie Observatories, 813 Santa Barbara Street, Pasadena, 91101 California, USA e-mail: email@example.com
2 Laboratoire d'Astrophysique de Marseille, Traverse du siphon, 13376 Marseille Cedex 12, France e-mail: [Alessandro.Boselli;Veronique.Buat;Jose.Donas;Bruno.Milliard]@oamp.fr
Accepted: 13 May 2004
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.
Key words: galaxies: spiral / ultraviolet: galaxies / ISM: dust, extinction
© ESO, 2004