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  1. Implications of the Nanohertz Gravitational-wave Background for Galactic Feedback and Massive Black Hole Growth

    Publication
    We investigate how pulsar timing array (PTA) measurements of the nanoHertz gravitational-wave background (GWB) can constrain models for the growth history of supermassive black holes (SMBHs) and …

  2. Heavy Seeds and the First Black Holes: Insights from the BRAHMA Simulations

    Publication
    From the luminous quasars at \(z \sim 6\) to the recent \(z \sim 9-11\) AGNs revealed by JWST, observations of the earliest black hole (BH) populations can …

  3. How Does Feedback Affect the Star Formation Histories of Galaxies?

    Publication
    Star formation in galaxies is regulated by the interplay of a range of processes that shape the multiphase gas in the interstellar and circumgalactic media. Using the Cosmology …

  4. A smooth filament origin for distant prolate galaxies seen by JWST and HST

    Publication
    The initial gravitational collapse of Dark Matter and gas forms a universal filamentary network where the first galaxies form, with shapes and sizes that depend on the choice …

  5. Dark Matter Velocity Distributions for Direct Detection: Astrophysical Uncertainties Are Smaller Than They Appear

    Publication
    The sensitivity of direct detection experiments depends on the phase-space distribution of dark matter near the Sun, which can be modeled theoretically using cosmological hydrodynamical simulations of …

  6. Development of Turbulence in Postshock Regions

    Publication
    Supersonic isothermal turbulence is ubiquitous in the interstellar medium. This work presents high-resolution AREPO hydrodynamical simulations of isolated shocks moving through supersonic turbulence to study the development …

  7. Applying a star formation model calibrated on high-resolution interstellar medium simulations to cosmological simulations of galaxy formation

    Publication
    Modern high-resolution simulations of the interstellar medium (ISM) have shown that key factors in governing star formation are the competing influences of radiative dissipation, pressure support driven …

  8. MISTRAL: a model for AGN winds from radiatively efficient accretion in cosmological simulations

    Publication
    Feedback from active galactic nuclei (AGNs) is crucial for regulating galaxy evolution. Motivated by observations of broad absorption line winds from rapidly accreting supermassive black holes (SMBHs), we …

  9. Prevention is better than cure? Feedback from high specific energy winds in cosmological simulations with ARKENSTONE

    Publication
    We deploy the new ARKENSTONE galactic wind model in cosmological simulations for the first time, allowing us to robustly resolve the evolution and impact of high specific energy …

  10. Diverse dark matter haloes in two-field fuzzy dark matter

    Publication
    Fuzzy dark matter (FDM) is a compelling candidate for dark matter, offering a natural explanation for the structure of diffuse low-mass haloes. However, the canonical FDM model …

  11. Cosmological Simulations of Stellar Halos with Gaia Sausage–Enceladus Analogs: Two Sausages, One Bun?

    Publication
    Observations of the Milky Way's stellar halo find that it is predominantly comprised of a radially biased population of stars, dubbed the Gaia Sausage–Enceladus, or GSE …

  12. Field-level simulation-based inference with galaxy catalogs: the impact of systematic effects

    Publication
    It has been recently shown that a powerful way to constrain cosmological parameters from galaxy redshift surveys is to train graph neural networks to perform field-level likelihood …

  13. Observational Signatures of AGN Feedback in the Morphology and the Ionization States of Milky Way-like Galaxies

    Publication
    We make an in-depth analysis of different AGN jet models' signatures, inducing quiescence in galaxies with a halo mass of \(10^{12} M_\odot\). Three jet models …

  14. Signatures of black hole seeding in the local Universe: Predictions from the BRAHMA cosmological simulations

    Publication
    The first "seeds" of supermassive black holes (BHs) continue to be an outstanding puzzle, and it is currently unclear whether the imprints of early seed formation survive today …

  15. Toward Implementation of the Pressure-regulated, Feedback-modulated Model of Star Formation in Cosmological Simulations: Methods and Application to TNG

    Publication
    Traditional star formation subgrid models implemented in cosmological galaxy formation simulations, such as that of V. Springel & L. Hernquist (hereafter SH03), employ adjustable parameters to satisfy constraints measured …

  16. Introducing the BRAHMA simulation suite: signatures of low-mass black hole seeding models in cosmological simulations

    Publication
    The first "seeds" of supermassive black holes (BH) can range from \(\sim10^2-10^6~M_{\odot}\). However, the lowest mass seeds (\(\lesssim10^3 M_{\odot}\)) are inaccessible …