Gas component parameters in the nucleus of the galaxy NGC 5879.
Abstract
Spectrophotometric observations of the NGC 5879 galaxy are presented and analyzed. It is found that the observed electron density, 1550 per cu cm, is close to the mean value for planetary nebulosity and is two to five times as high as the mean value for the zones (O II) in the outer groups of galaxies or H II regions. The luminosity at the line H-alpha-L(H-alpha) is a factor of 3-4 lower than that of Sy 1 galaxies. While the effective volume of the gas is of the same order as that of Sy 1 G, the gas content of the nucleus of the latter is higher by two orders of magnitude; the ionization sources differ substantially. On the basis of the results obtained, it is concluded that the NGC 5879 galaxy manifests a weak activity, expressed in relatively strong emission lines, and can be regarded as a galaxy of the M 51 or M 81 type.
- Publication:
-
Bolgarska Akademiia Nauk Doklady
- Pub Date:
- 1984
- Bibcode:
- 1984BlDok..37.1287P
- Keywords:
-
- Astronomical Spectroscopy;
- Cosmic Gases;
- Galactic Nuclei;
- Spectrum Analysis;
- Electron Density (Concentration);
- Emission Spectra;
- H Ii Regions;
- Ionization Potentials;
- Spectral Line Width;
- Astrophysics;
- Galactic Nuclei:Gas Content