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DETECTION OF THE SPLASHBACK RADIUS AND HALO ASSEMBLY BIAS OF MASSIVE GALAXY CLUSTERS
2016
Astrophysical Journal
We show that the projected number density profiles of SDSS photometric galaxies around galaxy clusters displays strong evidence for the splashback radius, a sharp halo edge corresponding to the location of the first orbital apocenter of satellite galaxies after their infall. We split the clusters into two subsamples with different mean projected radial distances of their members, 〈 R_ mem〉, at fixed richness and redshift, and show that the sample with smaller 〈 R_ mem〉 has a smaller ratio of
doi:10.3847/0004-637x/825/1/39
fatcat:bywybinkkfa4ponl7i43wawxxm