Related Galaxies with Different Redshifts
Abstract
Instances of visually observed apparently interacting galaxies in which one of the two is smaller, yet displays an anomalously higher redshift are examined. The smaller component is hypothesized to be much farther away, and thereby receding at a greater velocity. The objects NGC 7603, AM 0213-2833, AM 0328-222, AM 2006-295, and NGC 1232 are cited as examples. However, one of the main spiral arms of NGC 1232 is displaced where the apparently more distant object is located. Additionally, a smaller object is close by and, besides being too bright to be dimmed by light transmission through interstellar dust, displays a redshift fitted to a receding velocity of nearly 0.1 c. The possibility that the companion objects are low-redshift quasars that are members of a family of galaxies is discussed.
- Publication:
-
Sky and Telescope
- Pub Date:
- April 1983
- Bibcode:
- 1983S&T....65..307A
- Keywords:
-
- Galactic Radiation;
- Quasars;
- Radial Velocity;
- Red Shift;
- Spiral Galaxies;
- Astronomical Photography;
- Doppler Effect;
- Interacting Galaxies;
- Interstellar Extinction;
- Light Transmission;
- Astrophysics