http://arxiv.org/abs/1901.03994
A direct numerical evidence for the obstructing effect of the coherent tides on the satellites around the galaxy clusters is presented. Analyzing the numerical data from a high-resolution N-body simulation, we calculate the mean fractions of the tangential velocities of the satellites in the infall zone around the cluster halos and investigate if and how they depend on the tidal coherence defined as the alignments between the major principal axes of the local tidal fields smoothed on the linear and nonlinear scales. It is found that the infall-zone satellites located in the regions with higher tidal coherence have significantly larger mean fractions of the tangential velocities, which indicates that the radial infall of the satellites onto the host clusters are obstructed by the coherent tides. We also show that those satellites separated by shorter distances from the host clusters, having lower-masses, and embedded in the anisotropic large-scale environments like filaments and sheets, are more vulnerable to the obstructing effect of the coherent tides.
J. Lee
Tue, 15 Jan 19
81/83
Comments: submitted for publication in ApJL, 8 figures, 1 table
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