Galaxy Cluster Bulk Flows and Collision Velocities in Qumond

Authors

Stacy S. McGaugh, Case Western Reserve UniversityFollow

Author ORCID Identifier

Stacy S. McGaugh

Document Type

Article

Publication Date

6-27-2013

Abstract

We examine the formation of clusters of galaxies in numerical simulations of a QUMOND cosmogony with massive sterile neutrinos. Clusters formed in these exploratory simulations develop higher velocities than those found in ΛCDM simulations. The bulk motions of clusters attain ∼1000 km s -1 by low redshift, comparable to observations whereas ΛCDM simulated clusters tend to fall short. Similarly, high pairwise velocities are common in cluster-cluster collisions like the Bullet Cluster. There is also a propensity for the most massive clusters to be larger in QUMOND and to appear earlier than in ΛCDM, potentially providing an explanation for "pink elephants" like El Gordo. However, it is not obvious that the cluster mass function can be recovered. © 2013. The American Astronomical Society. All rights reserved.

Keywords

galaxies: clusters: general, large-scale structure of universe

Language

English

Publication Title

Astrophysical Journal

Grant

908370

Rights

© The American Astronomical Society. All rights reserved. This content is free to access, download, and share. For all other uses, you must obtain permission to reuse content: https://journals.aas.org/article-charges-and-copyright/#AAS_material

Recommended Citation

Harley Katz et al 2013. Galaxy Cluster Bulk Flows and Collision Velocities in Qumond. ApJ 772 10