Invited review presented at IAU Symposium 317: The General Assembly of Galaxy Halos, 2015.
http://arxiv.org/abs/1510.01929

For a PDF version of the article, click here.

INTRAGROUP AND INTRACLUSTER LIGHT

J. Christopher Mihos


Department of Astronomy, Case Western Reserve University


Abstract: The largest stellar halos in the universe are found in massive galaxy clusters, where interactions and mergers of galaxies, along with the cluster tidal field, all act to strip stars from their host galaxies and feed the diffuse intracluster light (ICL) and extended halos of brightest cluster galaxies (BCGs). Studies of the nearby Virgo Cluster reveal a variety of accretion signatures imprinted in the morphology and stellar populations of its ICL. While simulations suggest the ICL should grow with time, attempts to track this evolution across clusters spanning a range of mass and redshift have proved difficult due to a variety of observational and definitional issues. Meanwhile, studies of nearby galaxy groups reveal the earliest stages of ICL formation: the extremely diffuse tidal streams formed during interactions in the group environment.


Keywords. galaxies: clusters, galaxies: halos, galaxies: evolution


Table of Contents

INTRODUCTION

ICL IN THE VIRGO CLUSTER

ICL SYSTEMATICS: CHALLENGES AND METRICS

DIFFUSE LIGHT IN NEARBY GALAXY GROUPS

REFERENCES

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