On the Ionizing Sources in Spiral Galaxies: I. From Central Regions to Thick Disk and Disk-Halo Connection

Abstract

We study the ionizing sources in spiral galaxies and examine in more detail our Galaxy. Using Taylor & Cordes (1993) model we analyze the electron density in different parts of the Galaxy, and emphasize the still unsolved problems. Finally, we compare the intensities of H$\alpha$ emission in disk and halo.

5 pages, plain TeX, 1 figure, uses psfig, accepted as a contribution to the 19th Summer School and International Symposium of the Physics of Ionized Gases (SPIG), to be held at Zlatibor, Yugoslavia, August 31-September 4, 1998