Annu. Rev. Astron. Astrophys. 1992. 30: 575-611 Copyright © 1992 by Annual Reviews. All rights reserved

Reprinted with kind permission from Annual Reviews, 4139 El Camino Way, Palo Alto, California, USA

KEY WORDS: cosmic rays, free-free emission, infrared radiation, star formation, synchrotron radiation

Table of Contents

INTRODUCTION

THE POPULATION OF NORMAL GALAXIES

FREE-FREE EMISSION AND ABSORPTION

Basic Equations

Isolating the Thermal Emission

Integrated Radio Spectra and Brightness Temperatures

SYNCHROTRON RADIATION

Basic Equations

Magnetic Fields

Cosmic-Ray Sources and Transport

THE FIR/RADIO CORRELATION

RADIO EMISSION AND STAR FORMATION

Nonthermal Luminosity and the Supernova Rate

A Simple Model for Radio Emission from Normal Galaxies

SUMMARY

REFERENCES