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- W2896022124 abstract "ABSTRACT We present bahamas-SIDM, the first large-volume, $(400 , h^{-1} mathrm{, Mpc})^{3}$, cosmological simulations including both self-interacting dark matter (SIDM) and baryonic physics. These simulations are important for two primary reasons: (1) they include the effects of baryons on the dark matter distribution and (2) the baryon particles can be used to make mock observables that can be compared directly with observations. As is well known, SIDM haloes are systematically less dense in their centres, and rounder, than CDM haloes. Here, we find that that these changes are not reflected in the distribution of gas or stars within galaxy clusters, or in their X-ray luminosities. However, gravitational lensing observables can discriminate between DM models, and we present a menu of tests that future surveys could use to measure the SIDM interaction strength. We ray-trace our simulated galaxy clusters to produce strong lensing maps. Including baryons boosts the lensing strength of clusters that produce no critical curves in SIDM-only simulations. Comparing the Einstein radii of our simulated clusters with those observed in the CLASH survey, we find that at velocities around $1000 mathrm{, km , s^{-1}}$ an SIDM cross-section of $sigma /m gtrsim 1 , mathrm{cm^2 , g^{-1}}$ is likely incompatible with observed cluster lensing." @default.
- W2896022124 created "2018-10-26" @default.
- W2896022124 creator A5018614093 @default.
- W2896022124 creator A5020847721 @default.
- W2896022124 creator A5022611236 @default.
- W2896022124 creator A5029979157 @default.
- W2896022124 creator A5033973593 @default.
- W2896022124 creator A5035995869 @default.
- W2896022124 creator A5065352702 @default.
- W2896022124 creator A5089151293 @default.
- W2896022124 date "2019-07-10" @default.
- W2896022124 modified "2023-10-14" @default.
- W2896022124 title "Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons" @default.
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