Alignments of Galaxy Group Shapes with Large Scale Structure

Understand

In this paper we analyse the alignment of galaxy groups with the surrounding large scale structure traced by spectroscopic galaxies from the Sloan Digital Sky Survey Data Release 7.

• We characterise these alignments by means of an extension of the classical two-point cross-correlation function, developed by Paz et al.
• 2008 (arXiv:0804.4477, MNRAS 389 1127).
• We find a strong alignment signal between the projected major axis of group shapes and the surrounding galaxy distribution up to scales of 30 Mpc/h.