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In this paper we study the density profiles of self-interacting dark matter (SIDM) haloes spanning the full observable mass range, from dwarf galaxies to galaxy clusters. Using realistic simulations that model the baryonic physics relevant…

Cosmology and Nongalactic Astrophysics · Physics 2021-01-25 Kyrylo Bondarenko , Anastasia Sokolenko , Alexey Boyarsky , Andrew Robertson , David Harvey , Yves Revaz

We present BAHAMAS-SIDM, the first large-volume, (400/h 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…

Cosmology and Nongalactic Astrophysics · Physics 2020-06-02 Andrew Robertson , David Harvey , Richard Massey , Vincent Eke , Ian G. McCarthy , Mathilde Jauzac , Baojiu Li , Joop Schaye

Recent claims of observational evidence for self-interacting dark matter (SIDM) have relied on a semi-analytic method for predicting the density profiles of galaxies and galaxy clusters containing SIDM. We present a thorough description of…

Cosmology and Nongalactic Astrophysics · Physics 2021-02-01 Andrew Robertson , Richard Massey , Vincent Eke , Joop Schaye , Tom Theuns

We use high-resolution hydrodynamical simulation to test the difference of halo properties in cold dark matter (CDM) and a self-interacting dark matter (SIDM) scenario with a constant cross-section of…

Astrophysics of Galaxies · Physics 2019-01-30 Giulia Despali , Martin Sparre , Simona Vegetti , Mark Vogelsberger , Jesús Zavala , Federico Marinacci

We present a suite of baryonic cosmological zoom-in simulations of self-interacting dark matter (SIDM) haloes within the ``Feedback In Realistic Environment'' (FIRE) project. The three simulated haloes have virial masses of $\sim 10^{12}\,…

The properties of low-mass dark matter (DM) halos appear to be remarkably diverse relative to cold, collisionless DM predictions, even in the presence of baryons. We show that self-interacting DM (SIDM) can simultaneously explain…

Astrophysics of Galaxies · Physics 2023-12-01 Ethan O. Nadler , Daneng Yang , Hai-Bo Yu

We investigate the response of self-interacting dark matter (SIDM) halos to the growth of galaxy potentials using idealized simulations, each run in tandem with standard collisionless Cold Dark Matter (CDM). We find a greater diversity in…

Astrophysics of Galaxies · Physics 2018-06-13 Oliver D. Elbert , James S. Bullock , Manoj Kaplinghat , Shea Garrison-Kimmel , Andrew S. Graus , Miguel Rocha

We combine the isothermal Jeans model and the model of adiabatic halo contraction into a simple semi-analytic procedure for computing the density profile of self-interacting dark-matter (SIDM) haloes with the gravitational influence from…

Self-interacting dark matter (SIDM) models have been proposed to solve the small-scale issues with the collisionless cold dark matter (CDM) paradigm. We derive equilibrium solutions in these SIDM models for the dark matter halo density…

Cosmology and Nongalactic Astrophysics · Physics 2014-07-16 Manoj Kaplinghat , Ryan E. Keeley , Tim Linden , Hai-Bo Yu

We employ isolated N-body simulations to study the response of self-interacting dark matter (SIDM) halos in the presence of the baryonic potentials. Dark matter self-interactions lead to kinematic thermalization in the inner halo, resulting…

Astrophysics of Galaxies · Physics 2018-10-26 Omid Sameie , Peter Creasey , Hai-Bo Yu , Laura V. Sales , Mark Vogelsberger , Jesus Zavala

Galaxies residing in dark matter halos exert significant gravitational effects that alter halo structure and dynamics. The complexity of these interactions escalates with the diversity of galactic structures and the variability in dark…

Cosmology and Nongalactic Astrophysics · Physics 2024-11-28 Daneng Yang

We present the "DARKSKIES" suite of one hundred, zoom-in hydrodynamic simulations of massive ($M_{200}>5\times10^{14}{\rm M}_\odot)$ galaxy clusters with self-interacting dark matter (SIDM). We super-sample the simulations such that $m_{\rm…

Cosmology and Nongalactic Astrophysics · Physics 2025-11-19 David Harvey , Yves Revaz , Matthieu Schaller , Aurel Schneider , Ethan Tregidga , Felix Vecchi

This work aims at assessing the impact of DM self-interactions on the properties of galaxy clusters. In particular, the goal is to study the angular dependence of the cross section by testing rare (large angle scattering) and frequent…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-24 Antonio Ragagnin , Massimo Meneghetti , Francesco Calura , Giulia Despali , Klaus Dolag , Moritz S. Fischer , Carlo Giocoli , Lauro Moscardini

Self-interacting dark matter (SIDM) is an alternative to the standard collisionless cold dark matter model (CDM), allowing for interactions between the dark matter particles through the introduction of a self-scattering cross-section.…

Cosmology and Nongalactic Astrophysics · Physics 2024-01-09 Elizabeth Johana Gonzalez , Agustín Rodriguez-Medrano , Luis Alberto Pereyra , Diego García Lambas

Galactic rotation curves are a fundamental constraint for any cosmological model. We use controlled N-body simulations of galaxies to study the gravitational effect of baryons in a scenario with collisionless cold dark matter (CDM) versus…

Astrophysics of Galaxies · Physics 2017-04-19 Peter Creasey , Omid Sameie , Laura V. Sales , Hai-Bo Yu , Mark Vogelsberger , Jesús Zavala

We perform high-resolution simulations of a MW-like galaxy in a self-interacting cold dark matter model with elastic cross section over mass of $1~\rm cm^2/g$ (SIDM) and compare to a model without self-interactions (CDM). We run our…

Astrophysics of Galaxies · Physics 2019-09-25 Victor H. Robles , Tyler Kelley , James S. Bullock , Manoj Kaplinghat

We present the first set of cosmological baryonic zoom-in simulations of galaxies including dissipative self-interacting dark matter (dSIDM). These simulations utilize the Feedback In Realistic Environments (FIRE-2) galaxy formation…

Astrophysics of Galaxies · Physics 2021-08-11 Xuejian Shen , Philip F. Hopkins , Lina Necib , Fangzhou Jiang , Michael Boylan-Kolchin , Andrew Wetzel

We present the first cosmological simulations of dwarf galaxies, which include dark matter self-interactions and baryons. We study two dwarf galaxies within cold dark matter, and four different elastic self-interacting scenarios with…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-19 Mark Vogelsberger , Jesus Zavala , Christine Simpson , Adrian Jenkins

Recently, Meneghetti et al. reported an excess of small-scale gravitational lenses in galaxy clusters. We study its implications for self-interacting dark matter (SIDM), compared with standard cold dark matter (CDM). We design controlled…

Astrophysics of Galaxies · Physics 2022-03-02 Daneng Yang , Hai-Bo Yu

We perform dark-matter-only simulations of 28 relaxed massive cluster-sized haloes for Cold Dark Matter (CDM) and Self-Interacting Dark Matter (SIDM) models, to study structural differences between the models at large radii, where the…

Cosmology and Nongalactic Astrophysics · Physics 2017-12-20 Thejs Brinckmann , Jesús Zavala , David Rapetti , Steen H. Hansen , Mark Vogelsberger
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