An H I synthesis study of the galaxy/QSO pair NGC 6503/1749+70.1.
Abstract
The galaxy/quasar pair NGC 6503/1749 + 70.1 has been mapped with a 1-arcmin beam in the 21-cm H I line using the Westerbork Synthesis Radio Telescope. The neutral hydrogen associated with the low-mass spiral galaxy shows an asymmetric distribution, and is centrally concentrated. A flat rotation curve is seen, resulting in a sharply rising mass-to-light ratio with radius, as well as kinematical evidence for warping of the H I plane. There are no clear cut morphological or physical features indicating an association of the galaxy and quasar.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- March 1981
- Bibcode:
- 1981A&A....96..393S
- Keywords:
-
- Hydrogen Clouds;
- Mapping;
- Microwave Spectra;
- Quasars;
- Radio Astronomy;
- Spiral Galaxies;
- Density Distribution;
- Galactic Rotation;
- Hydrogen Atoms;
- Radial Distribution;
- Velocity Distribution;
- Astrophysics