454 citations · 7.2k across the 161 of their papers we have counts for
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The geometric challenge of testing gravity with wide binaries
Kareem El-Badry
Wide binaries provide promising laboratories for testing general relativity (GR) in the low-acceleration regime. Recent observational studies have found that the difference in the…
Dwarf Galaxies in CDM, WDM, and SIDM: Disentangling Baryons and Dark Matter Physics
Alex Fitts, Michael Boylan-Kolchin, Brandon Bozek +9
We present a suite of FIRE-2 cosmological zoom-in simulations of isolated field dwarf galaxies, all with masses of M at , across a r…
The OSIRIS Lens-Amplified Survey (OLAS) I: Dynamical Effects of Stellar Feedback in Low Mass Galaxies at z ~ 2
Jessie Hirtenstein, Tucker Jones, Xin Wang +6
We introduce the OSIRIS Lens-Amplified Survey (OLAS), a kinematic survey of gravitationally lensed galaxies at cosmic noon taken with Keck adaptive optics. In this paper we present…
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…
The wide binary fraction of solar-type stars: emergence of metallicity dependence at a < 200 AU
Kareem El-Badry, Hans-Walter Rix
We combine a catalog of wide binaries constructed from Gaia DR2 with [Fe/H] abundances from wide-field spectroscopic surveys to quantify how the binary fraction varies with metalli…
A Closer look at Bursty Star Formation with and Distributions
Najmeh Emami, Brian Siana, Daniel R. Weisz +3
We investigate the bursty star formation histories (SFHs) of dwarf galaxies using the distribution of log() of 185 local galaxies. We expand on the work of Weisz et…
Imprints of white dwarf recoil in the separation distribution of Gaia wide binaries
Kareem El-Badry, Hans-Walter Rix
We construct from Gaia DR2 an extensive and very pure ( contamination) catalog of wide binaries containing main-sequence (MS) and white dwarf (WD) components within…
The Local Group on FIRE: Dwarf galaxy populations across a suite of hydrodynamic simulations
Shea Garrison-Kimmel, Philip F. Hopkins, Andrew Wetzel +8
We present a new set of high-resolution hydrodynamic cosmological zoom-in simulations that apply the Feedback In Realistic Environments (FIRE) physics to both Local Group (LG)-like…
An Empirical Measurement of the Initial-Final Mass Relation with Gaia White Dwarfs
Kareem El-Badry, Hans-Walter Rix, Daniel R. Weisz
We use data from Gaia DR2 to constrain the initial-final mass relation (IFMR) for field stars with initial masses . Precise parallaxes…
Formation, vertex deviation and age of the Milky Way's bulge: input from a cosmological simulation with a late-forming bar
Victor P. Debattista, Oscar A. Gonzalez, Robyn E. Sanderson +5
We present the late-time evolution of m12m, a cosmological simulation of a Milky Way-like galaxy from the FIRE project. The simulation forms a bar after redshift z = 0.2. We show t…
The formation and hierarchical assembly of globular cluster populations
Kareem El-Badry, Eliot Quataert, Daniel R. Weisz +2
We use a semi-analytic model for globular cluster (GC) formation built on dark matter merger trees to explore the relative role of formation physics and hierarchical assembly in de…
Where are the most ancient stars in the Milky Way?
Kareem El-Badry, Joss Bland-Hawthorn, Andrew Wetzel +7
The oldest stars in the Milky Way (MW) bear imprints of the Galaxy's early assembly history. We use FIRE cosmological zoom-in simulations of three MW-mass disk galaxies to study th…
No Assembly Required: Mergers are Mostly Irrelevant for the Growth of Low-mass Dwarf Galaxies
Alex Fitts, Michael Boylan-Kolchin, James S. Bullock +9
We investigate the merger histories of isolated dwarf galaxies based on a suite of 15 high-resolution cosmological zoom-in simulations, all with masses of $M_{\rm halo} \approx 10^…
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…