The Dynamics of the Active Galaxy NGC 1052
Abstract
NGC 1052 is an elliptical galaxy with an active nucleus. The authors present velocity maps for both the stars and ionized gas, the stellar velocity dispersion profile, and surface photometry of this galaxy. The stellar component rotates about an axis close to the projected minor axis, whereas the ionized gas rotates about an axis 69° away from that. There is a small stellar rotation on the photometric minor axis. The rotation axis of this gas disk is the same as that reported by van Gorkom et al. for the H I. This rotation axis remains constant over a factor of 10 in radius. The authors suggest that the galaxy has a triaxial figure and that the gas could be on stable orbits rotating about the long axis of the triaxial ellipsoid. The large misalignment of the gas and stellar rotation axes suggests that the interstellar medium in NGC 1052 originated elsewhere, perhaps from the nearby spiral NGC 1042.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1986
- DOI:
- 10.1086/163985
- Bibcode:
- 1986ApJ...302..234D
- Keywords:
-
- Active Galaxies;
- Elliptical Galaxies;
- Galactic Nuclei;
- Galactic Rotation;
- Radial Velocity;
- Star Distribution;
- Astronomical Photometry;
- Cosmic Dust;
- Interstellar Gas;
- Line Spectra;
- Mass To Light Ratios;
- Stellar Luminosity;
- Astrophysics;
- GALAXIES: INDIVIDUAL NGC NUMBER: NGC 1052;
- GALAXIES: INTERNAL MOTIONS;
- GALAXIES: PHOTOMETRY;
- GALAXIES: STRUCTURE