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

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 towards the centre 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.

Accepted by ApJ A few minor wording changes for clarity in the figure captions

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• Spin alignment of dark matter haloes in filaments and walls
• Radial Alignment in Simulated Clusters
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Cited by in corpus (6)

• X-ray reprocessing: Through the eclipse spectra of high mass X-ray binaries with XMM-Newton
• Galaxy Alignments in Very X-ray Luminous Clusters at z>0.5
• Galaxy alignment as a probe of large-scale filaments
• The Next Generation Fornax Survey (NGFS): VI. The Alignment of Dwarf Galaxies in The Fornax Cluster
• Primordial alignment of elliptical galaxies in intermediate redshift clusters
• A photometric analysis of Abell 1689: two-dimensional multi-structure decomposition, morphological classification, and the Fundamental Plane