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Title: GALAXY CLUSTER BULK FLOWS AND COLLISION VELOCITIES IN QUMOND

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 {Lambda}CDM simulations. The bulk motions of clusters attain {approx}1000 km s{sup -1} by low redshift, comparable to observations whereas {Lambda}CDM 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 {Lambda}CDM, potentially providing an explanation for ''pink elephants'' like El Gordo. However, it is not obvious that the cluster mass function can be recovered.

Authors:
; ;  [1]
  1. Department of Astronomy, University of Maryland, College Park, MD 20742 (United States)
Publication Date:
OSTI Identifier:
22140107
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 772; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COLLISIONS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; COSMOLOGY; FUNCTIONS; GALAXY CLUSTERS; MASS; NEUTRINOS; RED SHIFT; UNIVERSE; VELOCITY

Citation Formats

Katz, Harley, McGaugh, Stacy, Teuben, Peter, and Angus, G. W., E-mail: hkatz@astro.umd.edu, E-mail: stacy.mcgaugh@case.edu, E-mail: teuben@astro.umd.edu, E-mail: angus.gz@gmail.com. GALAXY CLUSTER BULK FLOWS AND COLLISION VELOCITIES IN QUMOND. United States: N. p., 2013. Web. doi:10.1088/0004-637X/772/1/10.
Katz, Harley, McGaugh, Stacy, Teuben, Peter, & Angus, G. W., E-mail: hkatz@astro.umd.edu, E-mail: stacy.mcgaugh@case.edu, E-mail: teuben@astro.umd.edu, E-mail: angus.gz@gmail.com. GALAXY CLUSTER BULK FLOWS AND COLLISION VELOCITIES IN QUMOND. United States. https://doi.org/10.1088/0004-637X/772/1/10
Katz, Harley, McGaugh, Stacy, Teuben, Peter, and Angus, G. W., E-mail: hkatz@astro.umd.edu, E-mail: stacy.mcgaugh@case.edu, E-mail: teuben@astro.umd.edu, E-mail: angus.gz@gmail.com. 2013. "GALAXY CLUSTER BULK FLOWS AND COLLISION VELOCITIES IN QUMOND". United States. https://doi.org/10.1088/0004-637X/772/1/10.
@article{osti_22140107,
title = {GALAXY CLUSTER BULK FLOWS AND COLLISION VELOCITIES IN QUMOND},
author = {Katz, Harley and McGaugh, Stacy and Teuben, Peter and Angus, G. W., E-mail: hkatz@astro.umd.edu, E-mail: stacy.mcgaugh@case.edu, E-mail: teuben@astro.umd.edu, E-mail: angus.gz@gmail.com},
abstractNote = {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 {Lambda}CDM simulations. The bulk motions of clusters attain {approx}1000 km s{sup -1} by low redshift, comparable to observations whereas {Lambda}CDM 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 {Lambda}CDM, potentially providing an explanation for ''pink elephants'' like El Gordo. However, it is not obvious that the cluster mass function can be recovered.},
doi = {10.1088/0004-637X/772/1/10},
url = {https://www.osti.gov/biblio/22140107}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 772,
place = {United States},
year = {Sat Jul 20 00:00:00 EDT 2013},
month = {Sat Jul 20 00:00:00 EDT 2013}
}