Pith. sign in

hub

Simba: Cosmological Simulations with Black Hole Growth and Feedback

42 Pith papers cite this work, alongside 1,023 external citations. Polarity classification is still indexing.

42 Pith papers citing it
1,023 external citations · Pith
abstract

We introduce the Simba simulations, the next generation of the Mufasa cosmological galaxy formation simulations run with Gizmo's meshless finite mass hydrodynamics. Simba includes updates to Mufasa's sub-resolution star formation and feedback prescriptions, and introduces black hole growth via the torque-limited accretion model of Angl\'es-Alc\'azar et al. (2017) from cold gas and Bondi accretion from hot gas, along with black hole feedback via kinetic bipolar outflows and X-ray energy. Ejection velocities are taken to be ~10^3 km/s at high Eddington ratios, increasing to ~8000 km/s at Eddington ratios below 2%, with a constant momentum input of 20L/c. Simba further includes an on-the-fly dust production, growth, and destruction model. Our Simba run with (100 Mpc/h)^3 and 1024^3 gas elements reproduces numerous observables, including galaxy stellar mass functions at z=0-6, the stellar mass--star formation rate main sequence, HI and H2 fractions, the mass-metallicity relation at z=0 and z=2, star-forming galaxy sizes, hot gas fractions in massive halos, and z=0 galaxy dust properties. However, Simba also yields an insufficiently sharp truncation of the z=0 mass function, and too-large sizes for low-mass quenched galaxies. We show that Simba's jet feedback is primarily responsible for quenching massive galaxies.

hub tools

citation-role summary

background 2 method 1

citation-polarity summary

years

2026 39 2025 3

representative citing papers

The limits of feedback from active galactic nuclei

astro-ph.GA · 2026-05-15 · unverdicted · novelty 6.0

AGN feedback creates a mass-independent entropy ceiling that allows outflows to escape halos only below M_200m = 10^13.7 M_sun, explaining depleted gas in groups versus near-cosmic fractions in clusters.

Empirical estimates of how massive galaxies can be in {\Lambda}CDM

astro-ph.GA · 2026-05-08 · conditional · novelty 6.0 · 2 refs

Corrected empirical limits show the most massive galaxies never exceed the theoretical baryonic maximum of 0.16 times halo virial mass, keeping observations consistent with LambdaCDM at all redshifts.

Probing the faint end of simulated galaxy counts at z>3

astro-ph.CO · 2026-05-15 · unverdicted · novelty 5.0

TNG100 and EAGLE hydrodynamical simulations underproduce faint compact galaxies at z>3 relative to CANDELS observations even after forward modeling and completeness corrections, with the mismatch linked to both detection effects and simulation physics.

citing papers explorer

Showing 42 of 42 citing papers.