Distributions, equivalent widths and metallicities of the HII regions in the spiral galaxies NGC 5457 and NGC 4395*
Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain
2 Departamento de Astrofísica, Facultad de Física, Universidad de La Laguna, 38071 La Laguna, Tenerife, Spain
Corresponding author: B. Cedrés, email@example.com
Accepted: 16 April 2002
Using CCD observations in the narrow band filters in Hα, Hβ, , ,  and  lines we have compiled a catalogue of 338 HII regions for the inner parts of NGC 5457 and 158 for NGC 4395. The extinction, equivalent widths, distributions, excitations, ionization hardness, ionization parameters and metallicities for these regions, a distinction being made between arm and inter-arm zones, are presented here with the first results of a study of stellar formation.
Key words: HII regions / galaxies: individual: NGC 4395, NGC 5194 / galaxies: abundances
© ESO, 2002