The impact of baryonic potentials on the gravothermal evolution of self-interacting dark matter haloes

Abstract

The presence of a central baryonic potential can have a significant impact on the gravothermal evolution of self-interacting dark matter (SIDM) haloes. We extend a semi-analytical fluid model to incorporate the influence of a static baryonic potential and calibrate it using controlled N-body simulations. We construct benchmark scenarios with varying baryon concentrations and different SIDM models, including constant and velocity-dependent self-interacting cross sections. The presence of the baryonic potential induces changes in SIDM halo properties, including central density, core size, and velocity dispersion, and it accelerates the halo's evolution in both expansion and collapse phases. Furthermore, we observe a quasi-universality in the gravothermal evolution of SIDM haloes with the baryonic potential, resembling a previously known feature in the absence of the baryons. By appropriately rescaling the physical quantities that characterize the SIDM haloes, the evolution of all our benchmark cases exhibits remarkable similarity. Our findings offer a framework for testing SIDM predictions using observations of galactic systems where baryons play a significant dynamical role.

9 pages + references + appendices, 10 figures, 3 tables; v3: as published in MNRAS

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Cited by in corpus (18)

• A Parametric Model for Self-Interacting Dark Matter Halos
• Dianoga SIDM: galaxy cluster self-interacting dark matter simulations
• Astrophysical Tests of Dark Matter Self-Interactions
• Introducing the AIDA-TNG project: galaxy formation in alternative dark matter models
• Numerical Challenges in Modeling Gravothermal Collapse in Self-Interacting Dark Matter Halos
• Numerical challenges for energy conservation in N-body simulations of collapsing self-interacting dark matter halos
• Formation of the Little Red Dots from the Core-collapse of Self-interacting Dark Matter Halos
• Exploring Self-Interacting Dark Matter Halos with Diverse Baryonic Distributions: A Parametric Approach
• SASHIMI-SIDM: Semi-analytical subhalo modelling for self-interacting dark matter at sub-galactic scales
• Gravothermal Catastrophe in Resonant Self-interacting Dark Matter Models
• Anisotropic strong lensing as a probe of dark matter self-interactions
• SHARP -- IX. The dense, low-mass perturbers in B1938+666 and J0946+1006: implications for cold and self-interacting dark matter
• COZMIC. III. Cosmological Zoom-in Simulations of Self-interacting Dark Matter with Suppressed Initial Conditions
• A Universal Analytic Model for Gravitational Lensing by Self-Interacting Dark Matter Halos
• New Cold Dark Matter Crisis Revealed by Multiscale Cluster Lensing
• An Enhanced Isothermal Jeans Approach to Constraining Dark Matter Self-Interactions from Galactic Kinematics
• Self-Interacting Dark Matter with Mass Segregation: A Unified Explanation of Dwarf Cores and Small-Scale Lenses
• Calibrating the SIDM Gravothermal Catastrophe with N-body Simulations