Arp (1980) reported three new discordant redshift cases. One of the reported systems was AM 0058-402. This system has main galaxy (object 1) connected to an apparent companion (object 2) galaxy with a spiral arm-like bridge. Problem is that main galaxy has radial velocity cz = 6773 km/s while the companion has radial velocity 16415 km/s, so the difference in these velocities is too large for them to be physically connected in traditional view. Arp says this about the bridge:
On this latter higher-resolution photograph, it is seen that the connecting filament is in the nature of a spiral arm emerging from the larger galaxy. But the arm is much longer than any of the other arms in the galaxy, emerges orthogonally rather than tangentially from the main body, and terminates directly at the center of the companion.
Figure 1 shows nearest objects with measured redshifts in AM 0058-402 field.
- The bridged object, object 2, seems to belong to a group of galaxies at about 16500 km/s. Object 19 (which is just outside the pictured field) is brightest and seemingly largest of the galaxies in this group, and might be the main galaxy of the group. Objects in the group (within this field) are 2, 6, 7, 8, 11, 16, and 19.
- There seems to be another group at redshift z = 0.177. This group seems to be overlapping with the 16500 km/s group described above. Objects in this group are 9, 10, 13, 14, and 17.
- Objects 12 and 15 are roughly aligned across object 1. Object 3 also falls to their alignment line.
Objects and their data
|1||MCG -07-03-005||spiral||0.022592 (6773 km/s)||14.5||0|
|2||PGC 003633||galaxy||0.054755 (16415 km/s)||15.6 (I)||0.426|
|6||ESP 38526||galaxy||0.055215 (16553 km/s)||19.18||3.706|
|7||ESP 40626||galaxy||0.053981 (16183 km/s)||17.33||4.657|
|8||ESP 40625||galaxy||0.054845 (16442 km/s)||17.86||6.093|
|11||ESP 38528||galaxy||0.055582 (16663 km/s)||18.84||6.858|
|16||ESP 38529||galaxy||0.054858 (16446 km/s)||18.84||7.258|
|19||LEDA 101141||E||0.054948 (16473 km/s)||16.17||7.961|
Filed under: DRS