The velocity field in the central region of the Mark 538 galaxy.
Abstract
The velocity field in the central region of Mrk 538 is determined from image-tube spectrograms taken with the prime-focus grating spectrograph of the 6-m telescope. Noncircular gas motions are present near the position angle (150 deg) of the line of nodes. The region of the galaxy interior to 1.3-kpc radius has a mass of up to 4.3 billion solar masses. Tides from the companion galaxy may prevent the inner and outer parts of the disk from being coplanar. The central velocity gradient is 131 km/sec per kpc.
- Publication:
-
Pisma v Astronomicheskii Zhurnal
- Pub Date:
- October 1982
- Bibcode:
- 1982PAZh....8..515A
- Keywords:
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- Astronomical Photography;
- Galactic Nuclei;
- Velocity Distribution;
- Radial Velocity;
- Spectrograms;
- Astrophysics