Abstract
In this project we will perform a study on the polycyclic aromatic hydrocarbons in a sample of galaxies with active nuclei and Starburst, with redshift z d 0.04, selected from Atlas Spitzer. Spectroscopic data in the range of 5-40 ¼m, and spectral synthesis codes, such as the PAhdb, will be used in the identification of possible carries of the Interstellar Diffuse Bands. Furthermore, w…