ST ScI Preprint #1364

The Spectral Energy Distribution of Spiral Galaxies

Spectral energy distributions (SEDs) are some of the most important sources of information for galaxies, especially for high redshift ones. Here we review recent work on the subject. We discuss the integrated spectra of galaxies of different morphological and activity type, their application to derive K-corrections and classification of high redshift objects. We also discuss the radio to X-rays SEDs of Seyfert 2's, Starbursts and normal galaxies, their behavior as a function of the waveband, their bolometric fluxes and the wavebands that contribute most to it.