2017A&A...608A.125S


Query : 2017A&A...608A.125S

2017A&A...608A.125S - Astronomy and Astrophysics, volume 608A, 125-125 (2017/12-1)

Simulations of galaxy cluster collisions with a dark plasma component.

SPETHMANN C., VEERMAE H., SEPP T., HEIKINHEIMO M., DESHEV B., HEKTOR A. and RAIDAL M.

Abstract (from CDS):

Context. Dark plasma is an intriguing form of self-interacting dark matter with an effective fluid-like behavior, which is well motivated by various theoretical particle physics models.
Aims. We aim to find an explanation for an isolated mass clump in the Abell 520 system, which cannot be explained by traditional models of dark matter, but has been detected in weak lensing observations.
Methods. We performed N-body smoothed particle hydrodynamics simulations of galaxy cluster collisions with a two component model of dark matter, which is assumed to consist of a predominant non-interacting dark matter component and a 10-40% mass fraction of dark plasma.
Results. The mass of a possible dark clump was calculated for each simulation in a parameter scan over the underlying model parameters. In two higher resolution simulations shock-waves and Mach cones were observed to form in the dark plasma halos.
Conclusions. By choosing suitable simulation parameters, the observed distributions of dark matter in both the Bullet cluster (1E 0657-558) and Abell 520 (MS 0451.5+0250) can be qualitatively reproduced.

Abstract Copyright: © ESO, 2017

Journal keyword(s): astroparticle physics - methods: numerical - dark matter - dark matter

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 RXC J0417.5-1154 ClG 04 17 34.6 -11 54 32           ~ 71 0
2 ACO 520 ClG 04 54 19.0 +02 56 49           ~ 406 0
3 ClG 0657-56 ClG 06 58 29.6 -55 56 39           ~ 867 1
4 ACO 2146 ClG 15 56 04.7 +66 20 24           ~ 157 0
5 ACO 3827 ClG 22 01 49.1 -59 57 15           ~ 143 0

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2022.05.28-22:58:04

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