SIMBAD references

2025ApJ...991...69N - Astrophys. J., 991, 69 (2025/September-3)

SIDM Concerto: Compilation and Data Release of Self-interacting Dark Matter Zoom-in Simulations.

NADLER E.O., KONG D., YANG D. and YU H.-B.

Abstract (from CDS):

We present SIDM Concerto: 14 cosmological zoom-in simulations in cold dark matter (CDM) and self-interacting dark matter (SIDM) models based on the Symphony and Milky Way-est suites. SIDM Concerto includes one Large Magellanic Cloud- (LMC-) mass system (host mass ∼1011M⊙), two Milky Way (MW) analogs (∼1012M⊙), two group-mass hosts (∼1013M⊙), and one low-mass cluster (∼1014M⊙). Each host contains ≈2 × 107 particles and is run in CDM and one or more strong, velocity-dependent SIDM models. Our analysis of SIDM (sub)halo populations over seven subhalo mass decades reveals that (1) the fraction of core-collapsed isolated halos and subhalos peaks at a maximum circular velocity corresponding to the transition of the SIDM cross section from a v–4 to v0 scaling; (2) SIDM subhalo mass functions are suppressed by ≈50% relative to CDM in LMC, MW, and group-mass hosts but are consistent with CDM in the low-mass cluster host; (3) subhalos' inner density profile slopes, which are more diverse in SIDM than in CDM, are sensitive to both the amplitude and shape of the SIDM cross section. Our simulations provide a benchmark for testing SIDM predictions with astrophysical observations of field and satellite galaxies, strong lensing systems, and stellar streams. Data products are publicly available at doi:10.5281/zenodo.14933624.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Dark matter - N-body simulations - Galaxy dark matter halos

Simbad objects: 6

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