A Photometric Study of Markarian Galaxies
Abstract
Photoelectric UB V observations have been obtained for 92 Markarian galaxies and an additional five Seyfert galaxies to study the colors of the continuous spectra in these objects. A total of 28 Seyfert galaxies, 42 other galaxies with bright blue nuclei, and 27 diffuse galaxies are included. Multiaperture observations are presented for seven of these galaxies. It is found that galaxies spectroscopically classified as Seyfert galaxies because of broad nuclear emission lines have UB V colors corresponding to nonthermal continua, but the numerous Markarian galaxies with bright nuclei having narrow emission lines do not have such colors; instead, the ultraviolet continua of these galaxies apparently arise from hot stars. New spectroscopic and photographic observations are also presented for some Markarian galaxies of particular interest, including Markarian 3 and 205. Subject headings: galactic nuclei galaxies, photometry of - Seyfert galaxies
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1973
- DOI:
- 10.1086/152205
- Bibcode:
- 1973ApJ...183...29W