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American Astronomical Society, Astrophysical Journal, 2(720), p. 1483-1489, 2010

DOI: 10.1088/0004-637x/720/2/1483

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The galaxy alignment effect in Abell 1689: Evolution, radial, and luminosity dependence

Journal article published in 2010 by Li-Wei Hung, Eduardo Banados ORCID, Roberto De Propris, Michael J. West
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We measure alignments on scales of 1 Mpc h-171 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 -171 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. © 2010. The American Astronomical Society. All rights reserved. Printed in the U.S.A.