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Related papers: The local dark matter distribution in self-interac…

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Dark matter self interactions can leave distinctive signatures on the properties of satellite galaxies around Milky Way--like hosts through their impact on tidal stripping, ram pressure, and gravothermal collapse. We delineate the regions…

Cosmology and Nongalactic Astrophysics · Physics 2023-01-13 Oren Slone , Fangzhou Jiang , Mariangela Lisanti , Manoj Kaplinghat

We present shape measurements of Milky Way-sized dark matter halos at redshift $z=0$ in a suite of 30 zoom simulations from the Auriga project. We compare the results in full magnetohydrodynamics against dark matter only simulations and…

Astrophysics of Galaxies · Physics 2019-10-23 Jesus Prada , Jaime E. Forero-Romero , Robert J. J. Grand , Ruediger Pakmor , Volker Springel

We use the APOSTLE suite of cosmological hydrodynamical simulations of the Local Group to examine the high speed tail of the local dark matter velocity distribution in simulated Milky Way analogues. The velocity distribution in the Solar…

Astrophysics of Galaxies · Physics 2024-03-26 Isabel Santos-Santos , Nassim Bozorgnia , Azadeh Fattahi , Julio F. Navarro

The majority of terrestrial direct detection experiments for Dark Matter (DM) rely on the Standard Halo Model (SHM), which assumes the local DM velocity distribution follows a Maxwell-Boltzmann distribution. However, galaxy mergers can…

Astrophysics of Galaxies · Physics 2026-03-30 Xiuyuan Zhang , Andreas Thoyas , Lina Necib , Andrew Wetzel , Arpit Arora

We study the density structures of dark matter subhalos for both cold dark matter and self-interacting dark matter models using high-resolution cosmological $N$-body simulations. We quantify subhalo's central density at 150 pc from the…

Astrophysics of Galaxies · Physics 2022-01-26 Toshihiro Ebisu , Tomoaki Ishiyama , Kohei Hayashi

Non-gravitational interactions between dark matter particles with strong scattering, but relatively small annihilation and dissipation, has been proposed to match various observables on cluster and group scales. In this paper, we present…

Cosmology and Nongalactic Astrophysics · Physics 2020-03-04 Arka Banerjee , Susmita Adhikari , Neal Dalal , Surhud More , Andrey Kravtsov

The Milky Way dark matter halo is formed from the accretion of smaller subhalos. These sub-units also harbor stars---typically old and metal-poor---that are deposited in the Galactic inner regions by disruption events. In this Letter, we…

Astrophysics of Galaxies · Physics 2018-01-31 Jonah Herzog-Arbeitman , Mariangela Lisanti , Piero Madau , Lina Necib

Making robust predictions for the phase space distribution of dark matter at the solar neighbourhood is vital for dark matter direct detection experiments. To date, almost all such predictions have been based on simulations that model the…

Astrophysics of Galaxies · Physics 2015-05-13 J. I. Read , L. Mayer , A. M. Brooks , F. Governato , G. Lake

We present N-body simulations of a new class of self-interacting dark matter models, which do not violate any astrophysical constraints due to a non-power-law velocity dependence of the transfer cross section which is motivated by a…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Mark Vogelsberger , Jesus Zavala , Abraham Loeb

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…

Dark matter N-body simulations suggest that the velocity distribution of dark matter is anisotropic. In this work we employ a mass model for the Milky Way whose parameters are determined from a fit to kinematical data. Then we adopt an…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Nassim Bozorgnia , Riccardo Catena , Thomas Schwetz

Self-interacting dark matter provides a promising alternative for the cold dark matter paradigm to solve potential small-scale galaxy formation problems. Nearly all self-interacting dark matter simulations so far have considered only…

Astrophysics of Galaxies · Physics 2019-03-19 Mark Vogelsberger , Jesús Zavala , Katelin Schutz , Tracy R. Slatyer

Terrestrial dark matter detection experiments probe the velocity-space distribution of dark matter particles in the vicinity of the Earth. We present a novel method, to be used in conjunction with standard cosmological simulations of…

Astrophysics · Physics 2009-11-07 David Stiff , Lawrence M. Widrow

Self-interaction of particulate dark matter may help thermalising the central region of the galactic halo and driving core formation. The core radius is expectedly sensitive to the self-interaction strength of dark matter (DM). In this…

Astrophysics of Galaxies · Physics 2022-09-07 Tirtha Sankar Ray , Sambo Sarkar , Abinash Kumar Shaw

We present a new set of cosmological zoom-in simulations of a MW-like galaxy which for the first time include elastic velocity-dependent self interacting dark matter (SIDM) and IllustrisTNG physics. With these simulations we investigate the…

Astrophysics of Galaxies · Physics 2022-12-21 Jonah C. Rose , Paul Torrey , Mark Vogelsberger , Stephanie O'Neil

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 use a cosmological simulation of the Local Group to make quantitative and speculative predictions for direct detection experiments. Cold dark matter (CDM) halos form via a complex series of mergers, accretion events and violent…

We study the orbital properties of dark matter haloes by combining a spectral method and cosmological simulations of Milky Way-sized galaxies. We compare the dynamics and orbits of individual dark matter particles from both hydrodynamic and…

Astrophysics of Galaxies · Physics 2017-02-01 Qirong Zhu , Lars Hernquist , Federico Marinacci , Volker Springel , Yuexing Li

The dark matter velocity distribution in the Solar neighbourhood is an important astrophysical input which enters in the predicted event rate of dark matter direct detection experiments. It has been recently suggested that the local dark…

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}\,…