The Next Generation Fornax Survey (NGFS). VI. The Alignment of Dwarf Galaxies in the Fornax Cluster

Abstract

Using the photometric data from the Next Generation Fornax Survey, we find a significant radial alignment signal among the Fornax dwarf galaxies. For the first time, we report that the radial alignment signal of nucleated dwarfs is stronger than that of non-nucleated ones at the 2.4 σ confidence level, and the dwarfs located in the outer region ( R > R vir /3; R vir is the Fornax virial radius) show a slightly stronger radial alignment signal than those in the inner region ( R