THE GALAXY ALIGNMENT EFFECT IN ABELL 1689: EVOLUTION, RADIAL, AND LUMINOSITY DEPENDENCE
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Date
2010
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Abstract
We measure alignments on scales of 1 Mpc h(71)(-1) for galaxies in Abell 1689 (z = 0.18) from an existing Hubble Space Telescope mosaic. We find evidence of galaxy alignment in the inner 500 h(71)(-1) kpc. The alignment appears to be stronger toward the center and is mostly present among the fainter galaxies, while bright galaxies are unaligned. This is consistent with a model where alignments originate from tidal locking.
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Keywords
galaxies: clusters: individual (Abell 1689)