A parametric model for self-interacting dark matter halos

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Original languageEnglish
Article number032
Journal / PublicationJournal of Cosmology and Astroparticle Physics
Volume2024
Issue number2
Online published21 Feb 2024
Publication statusPublished - Feb 2024

Abstract

We propose a parametric model for studying self-interacting dark matter (SIDM) halos. The model uses an analytical density profile, calibrated using a controlled N-body SIDM simulation that covers the entire gravothermal evolution, including core-forming and -collapsing phases. By normalizing the calibrated density profile, we obtain a universal description for SIDM halos at any evolution phase. The model allows us to infer properties of SIDM halos based on their cold dark matter (CDM) counterparts. As a basic application, we only require two characteristic parameters of an isolated CDM halo at z = 0. We then extend the model to incorporate effects induced by halo mass changes, such as major mergers or tidal stripping, making it applicable to both isolated halos and subhalos. The parametric model is tested and validated using cosmological zoom-in SIDM simulations available in the literature.

© 2024 IOP Publishing Ltd and Sissa Medialab

Research Area(s)

  • dark matter simulations, dark matter theory, rotation curves of galaxies

Citation Format(s)

A parametric model for self-interacting dark matter halos. / Yang, Daneng; Nadler, Ethan O.; Yu, Hai-Bo et al.
In: Journal of Cosmology and Astroparticle Physics, Vol. 2024, No. 2, 032, 02.2024.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review