454 citations · 7.2k across the 161 of their papers we have counts for
17 papers · 1 filter
NGC 1850 BH1 is another stripped-star binary masquerading as a black hole
Kareem El-Badry, Kevin Burdge
We show that the radial velocity-variable star in the black hole candidate NGC 1850 BH1 cannot be a normal subgiant, as was proposed, but is an overluminous…
Science with the Ultraviolet Explorer (UVEX)
S. R. Kulkarni, Fiona A. Harrison, Brian W. Grefenstette +53
UVEX is a proposed medium class Explorer mission designed to provide crucial missing capabilities that will address objectives central to a broad range of modern astrophysics. The…
RR Lyrae-based Distances for 39 Nearby Dwarf Galaxies Calibrated to Gaia eDR3
Pranav Nagarajan, Daniel R. Weisz, Kareem El-Badry
We provide uniform RR Lyrae-based distances to 39 dwarf galaxies in and around the Local Group. We determine distances based on a Bayesian hierarchical model that uses periods and…
Wide binaries from the H3 survey: the thick disk and halo have similar wide binary fractions
Hsiang-Chih Hwang, Yuan-Sen Ting, Charlie Conroy +8
Due to the different environments in the Milky Way's disk and halo, comparing wide binaries in the disk and halo is key to understanding wide binary formation and evolution. By usi…
Predictions for Complex Distributions of Stellar Elemental Abundances in Low-Mass Galaxies
Preet B. Patel, Sarah R. Loebman, Andrew Wetzel +3
We investigate stellar elemental abundance patterns at z = 0 in 8 low-mass (M_* = 10^6 - 10^9 M_sun) galaxies in the Feedback in Realistic Environments (FIRE-2) cosmological simula…
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…
Testing the Relationship Between Bursty Star Formation and Size Fluctuations of Local Dwarf Galaxies
Najmeh Emami, Brian Siana, Kareem El-Badry +7
Stellar feedback in dwarf galaxies plays a critical role in regulating star formation via galaxy-scale winds. Recent hydrodynamical zoom simulations of dwarf galaxies predict that…
Birth of the ELMs: a ZTF survey for evolved cataclysmic variables turning into extremely low-mass white dwarfs
Kareem El-Badry, Hans-Walter Rix, Eliot Quataert +2
We present a systematic survey for mass-transferring and recently-detached cataclysmic variables (CVs) with evolved secondaries, which are progenitors of extremely low-mass white d…
The effects of LMC-mass environments on their dwarf satellite galaxies in the FIRE simulations
Ethan D. Jahn, Laura V. Sales, Andrew Wetzel +4
Characterizing the predicted environments of dwarf galaxies like the Large Magellanic Cloud (LMC) is becoming increasingly important as next generation surveys push sensitivity lim…
LAMOST J0140355+392651: An evolved cataclysmic variable donor transitioning to become an extremely low mass white dwarf
Kareem El-Badry, Eliot Quataert, Hans-Walter Rix +6
We present LAMOST J0140355+392651 (hereafter J0140), a close ( hours) binary containing a bloated, low-mass () proto-white dwarf (WD)…
The Early Phases of Supernova 2020pni: Shock-Ionization of the Nitrogen-Enriched Circumstellar Material
G. Terreran, W. V. Jacobson-Galan, J. H. Groh +20
We present multiwavelength observations of the Type II SN 2020pni. Classified at days after explosion, the object showed narrow (FWHM $<250\,\textrm{km}\,\textrm{s}^{-1}…
Neutral CGM as damped Lyα absorbers at high redshift
Jonathan Stern, Amiel Sternberg, Claude-André Faucher-Giguère +8
Recent searches for the hosts of high-redshift () damped Ly absorbers (DLAs) have detected bright galaxies at distances of tens of kpc from the DLA. Using the FIRE-2 c…
Distant Relatives: The Chemical Homogeneity of Comoving Pairs Identified in Gaia
Tyler Nelson, Yuan-Sen Ting, Keith Hawkins +3
Comoving pairs, even at the separations of AU, are a predicted reservoir of conatal stars. We present detailed chemical abundances of 62 stars in 31 comoving p…
A million binaries from Gaia eDR3: sample selection and validation of Gaia parallax uncertainties
Kareem El-Badry, Hans-Walter Rix, Tyler M. Heintz
We construct from Gaia eDR3 an extensive catalog of spatially resolved binary stars within 1 kpc of the Sun, with projected separations ranging from a few au to 1 pc. We…
The origin of metal-poor stars on prograde disk orbits in FIRE simulations of Milky Way-mass galaxies
Isaiah B. Santistevan, Andrew Wetzel, Robyn E. Sanderson +3
In hierarchical structure formation, metal-poor stars in and around the Milky Way (MW) originate primarily from mergers of lower-mass galaxies. A common expectation is therefore th…
A classifier for spurious astrometric solutions in Gaia EDR3
Jan Rybizki, Gregory Green, Hans-Walter Rix +6
The Gaia early Data Release 3 has delivered exquisite astrometric data for 1.47 billion sources, which is revolutionizing many fields in astronomy. For a small fraction of these so…
TOI-1259Ab -- a gas giant planet with 2.7% deep transits and a bound white dwarf companion
David V. Martin, Kareem El-Badry, Vedad Kunovac Hodžić +33
We present TOI-1259Ab, a 1.0 Rjup gas giant planet transiting a 0.71 Rsun K-dwarf on a 3.48 day orbit. The system also contains a bound white dwarf companion TOI-1259B with a proje…