- de Mello et al.
- http://arxiv.org/abs/0711.2685
- They found both old and young stars in the region between the two galaxies and conclude that the former were flung out of either of the two while the latter have formed in the tidal tail.
- Overall, there seems to be quite little going on there compared to other tidal tails (e.g. of mergers) where active star formation is often seen.