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Second public data release of the FIRE-2 cosmological zoom-in simulations of galaxy formation
Andrew Wetzel, Jenna Samuel, Pratik J. Gandhi +34
We describe the second data release (DR2) of the FIRE-2 cosmological zoom-in simulations of galaxy formation, from the Feedback In Realistic Environments (FIRE) project, available…
The Star Formation History and Evolution of the Ultra-Diffuse M81 Satellite F8D1
Adam Smercina, Eric F. Bell, Benjamin F. Williams +15
We present deep HST imaging of one of the nearest ultra-diffuse galaxies (UDGs) outside of the Local Group: F8D1, a satellite of M81 known to be tidally disrupting. UDGs are an eni…
Public data release of the FIRE-2 cosmological zoom-in simulations of galaxy formation
Andrew Wetzel, Christopher C. Hayward, Robyn E. Sanderson +23
We describe a public data release of the FIRE-2 cosmological zoom-in simulations of galaxy formation, available at http://flathub.flatironinstitute.org/fire, from the Feedback In R…
Hot-mode accretion and the physics of thin-disk galaxy formation
Zachary Hafen, Jonathan Stern, James Bullock +16
We use FIRE simulations to study disk formation in z~0, Milky Way-mass galaxies, and conclude that a key ingredient for the formation of thin stellar disks is the ability for accre…
The impact of cosmic rays on dynamical balance and disk-halo interaction in Lstar disk galaxies
T. K. Chan, Dusan Keres, Alexander B. Gurvich +4
Cosmic rays (CRs) are an important component in the interstellar medium (ISM), but their effect on the dynamics of the disk-halo interface (< 10 kpc from the disk) is still unclear…
The In-situ Origins of Dwarf Stellar Outskirts in FIRE-2
Erin Kado-Fong, Robyn E. Sanderson, Jenny E. Greene +11
Extended, old, and round stellar halos appear to be ubiquitous around high-mass dwarf galaxies () in the observed universe. However, it is unlike…
Gas infall and radial transport in cosmological simulations of Milky Way-mass disks
Cameron Trapp, Dusan Keres, T. K. Chan +7
Observations indicate that a continuous supply of gas is needed to maintain observed star formation rates in large, disky galaxies. To fuel star formation, gas must reach the inner…
Which AGN Jets Quench Star Formation in Massive Galaxies?
Kung-Yi Su, Philip F. Hopkins, Greg L. Bryan +12
Without additional heating, radiative cooling of gas in the halos of massive galaxies (Milky Way and above) produces cold gas or stars in excess of that observed. Previous work sug…
Virial shocks are suppressed in cosmic ray-dominated galaxy halos
Suoqing Ji, Dušan Kereš, T. K. Chan +5
We study the impact of cosmic rays (CRs) on the structure of virial shocks, using a large suite of high-resolution cosmological FIRE-2 simulations accounting for CR injection by su…
Virialization of the inner CGM in the FIRE simulations and implications for galaxy discs, star formation and feedback
Jonathan Stern, Claude-André Faucher-Giguère, Drummond Fielding +13
We use the FIRE-2 cosmological simulations to study the formation of a quasi-static, virial-temperature gas phase in the circumgalactic medium (CGM) at redshifts 0<z<5, and how the…
Pressure balance in the multiphase ISM of cosmologically simulated disk galaxies
Alexander B. Gurvich, Claude-André Faucher-Giguère, Alexander J. Richings +13
Pressure balance plays a central role in models of the interstellar medium (ISM), but whether and how pressure balance is realized in a realistic multiphase ISM is not yet well und…
A dark matter profile to model diverse feedback-induced core sizes of CDM haloes
Alexandres Lazar, James S. Bullock, Michael Boylan-Kolchin +11
We analyze the cold dark matter density profiles of 54 galaxy halos simulated with FIRE-2 galaxy formation physics, each resolved within of the halo virial radius. These ha…
Effects of Different Cosmic Ray Transport Models on Galaxy Formation
Philip F. Hopkins, T. K. Chan, Jonathan Squire +4
Cosmic rays (CRs) with ~GeV energies can contribute significantly to the energy and pressure budget in the interstellar, circumgalactic, and intergalactic medium (ISM, CGM, IGM). R…
Cosmic-Ray Driven Outflows to Mpc Scales from Galaxies
Philip F. Hopkins, T. K. Chan, Suoqing Ji +4
We study the effects of cosmic rays (CRs) on outflows from star-forming galaxies in the circum and inter-galactic medium (CGM/IGM), in high-resolution, fully-cosmological FIRE-2 si…
The Fates of the Circumgalactic Medium in the FIRE Simulations
Z. Hafen, C. -A. Faucher-Giguere, D. Angles-Alcazar +7
We analyze the different fates of the circumgalactic medium (CGM) in FIRE-2 cosmological simulations, focusing on the redshifts z=0.25 and z=2 representative of recent surveys. Our…
Properties of the Circumgalactic Medium in Cosmic Ray-Dominated Galaxy Halos
Suoqing Ji, T. K. Chan, Cameron B. Hummels +6
We investigate the impact of cosmic rays (CRs) on the circumgalactic medium (CGM) in FIRE-2 simulations, for ultra-faint dwarf through Milky Way (MW)-mass halos hosting star-formin…
Dark and luminous satellites of LMC-mass galaxies in the FIRE simulations
Ethan D. Jahn, Laura V. Sales, Andrew Wetzel +5
Within CDM, dwarf galaxies like the Large Magellanic Cloud (LMC) are expected to host numerous dark matter subhalos, several of which should host faint dwarf companions. Recent…
But What About... Cosmic Rays, Magnetic Fields, Conduction, & Viscosity in Galaxy Formation
Philip F. Hopkins, T. K. Chan, Shea Garrison-Kimmel +6
We present a suite of high-resolution cosmological simulations, using the FIRE-2 feedback physics together with explicit treatment of magnetic fields, anisotropic conduction and vi…
Star formation histories of dwarf galaxies in the FIRE simulations: dependence on mass and Local Group environment
Shea Garrison-Kimmel, Andrew Wetzel, Phillip F. Hopkins +13
We study star formation histories (SFHs) of dwarf galaxies (stellar mass ) from FIRE-2 cosmological zoom-in simulations. We compare dwarf…
Cosmic Rays or Turbulence can Suppress Cooling Flows (Where Thermal Heating or Momentum Injection Fail)
Kung-Yi Su, Philip F. Hopkins, Christopher C. Hayward +6
The quenching `maintenance' and `cooling flow' problems are important from the Milky Way through massive cluster elliptical galaxies. Previous work has shown that some source of en…
Cosmic ray feedback in the FIRE simulations: constraining cosmic ray propagation with GeV gamma ray emission
T. K. Chan, D. Keres, P. F. Hopkins +4
We present the implementation and the first results of cosmic ray (CR) feedback in the Feedback In Realistic Environments (FIRE) simulations. We investigate CR feedback in non-cosm…
The Origins of the Circumgalactic Medium in the FIRE Simulations
Z. Hafen, C. -A. Faucher-Giguere, D. Angles-Alcazar +10
We use a particle tracking analysis to study the origins of the circumgalactic medium (CGM), separating it into (1) accretion from the intergalactic medium (IGM), (2) wind from the…
Gas Kinematics in FIRE Simulated Galaxies Compared to Spatially Unresolved HI Observations
Kareem El-Badry, Jeremy Bradford, Eliot Quataert +9
The shape of a galaxy's spatially unresolved, globally integrated 21-cm emission line depends on its internal gas kinematics: galaxies with rotation-supported gas disks produce dou…
Reconciling observed and simulated stellar halo masses
Robyn E. Sanderson, Shea Garrison-Kimmel, Andrew Wetzel +6
We use cosmological hydrodynamical simulations of Milky-Way-mass galaxies from the FIRE project to evaluate various strategies for estimating the mass of a galaxy's stellar halo fr…