New MMT/Hectospec spectroscopy centered on the galaxy cluster A2626 and covering a ∼1.8deg2 area out to z∼0.46 more than doubles the number of galaxy redshifts in this region. The spectra confirm four clusters previously identified photometrically. A2625, which was previously thought to be a close neighbor of A2626, is in fact much more distant. The new data show six substructures associated with A2626 and five more associated with A2637. There is also a highly collimated collection of galaxies and galaxy groups between A2626 and A2637 having at least three and probably four substructures. At larger scales, the A2626--A2637 complex is not connected to the Pegasus--Perseus filament.
@article{arxiv.2106.08806,
title = {Abell 2626 and friends: large and small scale structure},
author = {J. Healy and S. P. Willner and M. A. W. Verheijen and S. -L. Blyth},
journal= {arXiv preprint arXiv:2106.08806},
year = {2021}
}
Comments
18 pages, 13 figures, accepted for publication in the Astronomical Journal