Structure of the nuclei of the Seyfert galaxy NGC 1275 and the quasar3C 345.
Abstract
The structure of the quasar 3C 345 and of the Seyfert galaxy NGC 1275 has been studied at a wavelength of 18 cm with a global VLBI network. Within 3C 345 are a nucleus and a compact feature, both measuring about 0.0003 arcsec, accompanied by a thin jet that weakens and bends with distance from the nucleus. In NGC 1275, the compact central feature observed at shorter wavelengths is absent at 18 cm, probably because of synchrotron self-absorption as well as absorption in ionized gas surrounding the nucleus.
- Publication:
-
Pisma v Astronomicheskii Zhurnal
- Pub Date:
- June 1985
- Bibcode:
- 1985PAZh...11..420M
- Keywords:
-
- Galactic Nuclei;
- Galactic Structure;
- Quasars;
- Radio Astronomy;
- Seyfert Galaxies;
- Centimeter Waves;
- Ionized Gases;
- Plasma Jets;
- Self Absorption;
- Synchrotron Radiation;
- Astronomy