Attenuation Laws for Galaxies with Different Star Formation Histories, Based on the SDSS Images

Abstract

Attenuation curves (laws) in the optical part of thespectrum (from about 3500 AA~to 9000 AA) are determined for galaxieswith different star formation histories (SFHs) using images in five photometrical bands from the Sloan Digital Sky Survey (SDSS). Owing to large surveys like SDSS, it is possible to defineseveral subgroups of galaxies with similar SFHs using two spectralindices that trace SFH. Attenuation curves are analyzed in termsof SFH and compared to the curves that are often used for dustcorrection of the observed data.

Keywords

• Galaxies: photometry
• Galaxies: ISM
• Galaxies: stellar content