Bulletin of the American Physical Society
Four Corners Section 2023 Meeting
Friday–Saturday, October 20–21, 2023; River Woods Conference Center, Logan, Utah
Session S05: Astrophysics II
1:42 PM–2:52 PM,
Saturday, October 21, 2023
Riverwoods Conference Center
Room: Elm
Chair: Ludger Scherliess, Utah State University
Abstract: S05.00002 : Constraining Modified Gravity Using Galaxy Cluster Dynamics
1:56 PM–2:10 PM
Presenter:
Eliza C Diggins
(University of Utah)
Authors:
Eliza C Diggins
(University of Utah)
Daniel R Wik
(University of Utah)
To identify constraints on each theory, we utilize its formalism in conjunction with a sample of galaxy clusters analyzed using Chandra data to study the capacity of each theory to correctly describe the complex interplay between the intracluster medium (ICM) and its gravitational potential. We use the assumption of hydrostatic equilibrium (HSE) in the cluster sample to illustrate restrictions on the ICM temperature profiles required by each of the theories studied. We demonstrate that the MOND + DM paradigm can be significantly constrained by the imposition of hydrostatic equilibrium in galaxy clusters and several results are derived to that effect. We show that these constraints could be tested with upcoming X-ray missions, including XRISM. Furthermore, we illustrate significant inconsistencies in the EMOND paradigm which suggest that extension to be non-viable in clusters of galaxies. This work has demonstrated that MOND extensions make refutable predictions which should be detectable with current or upcoming observational technologies; signifying that each of these theories could be tested by observing missions. While the failure of these extensions doesn't necessarily indicate that MOND is an incorrect theory, showing that these extensions fail to produce viable results clearly places the burden of progression on MOND theorists to establish MOND paradigms in which such phenomenology is no longer predicted.
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