The origin of the ionization of the diffuse interstellar medium in spiral galaxies. I. Photometric measurements
We present a complete study of the diffuse ionized gas (DIG) in a sample of six spiral galaxies (NGC 157, NGC 3359, NGC 3631, NGC 6764, NGC 6951, NGC 7479) using very high quality Hα images which allow analysis down to very low surface brightness (between 0.3 and 2 pc cm-6). Separation of the diffuse Hα emission from that of the H II regions was
Zurita, A. et al.
Fecha de publicación:
11
2000