2019ApJ...880..145Z


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.18CEST05:55:52

2019ApJ...880..145Z - Astrophys. J., 880, 145-145 (2019/August-1)

Testing emergent gravity with optical, X-ray, and weak lensing measurements in massive, relaxed galaxy clusters.

ZUHONE J.A. and SIMS J.

Abstract (from CDS):

We test the predictions of emergent gravity (EG) using matter densities of relaxed, massive clusters of galaxies observed from optical and X-ray wavebands. We improve upon previous work in this area by including the baryon mass contribution of the brightest cluster galaxy (BCG) in each system, in addition to total mass profiles from gravitational lensing and mass profiles of the X-ray emitting gas from Chandra. We use this data in the context of EG to predict the "apparent" dark matter (DM) distribution from the observed baryon distribution, and vice versa. We find that although the inclusion of the BCG in the analysis improves the agreement with observations in the inner regions of the clusters (r≲10–30 kpc), at larger radii (r∼100–200 kpc) the EG predictions for mass profiles and baryon mass fractions are not in agreement with observations by a factor of up to ∼2-6, though the agreement improves at radii near r500. At least in its current form, EG does not appear to reproduce the observed characteristics of relaxed galaxy clusters as well as cold DM models.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): dark matter - galaxies: clusters: general

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 ACO 383 ClG 02 48 06.9 -03 29 32           ~ 310 0
2 ClG 0657-56 ClG 06 58 29.6 -55 56 39           ~ 833 1
3 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 232 0
4 ACO 963 ClG 10 17 09.6 +39 01 00           ~ 360 0
5 ACO 2142 ClG 15 58 20.00 +27 14 00.3           ~ 693 0
6 ACO 2319 ClG 19 20 45.3 +43 57 43           ~ 424 1
7 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 637 2

    Equat.    Gal    SGal    Ecl

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2021.05.18-05:55:52

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