38 citations · 50 across the 5 of their papers we have counts for
9 papers · 1 filter
Binaries drive high Type Ia supernova rates in dwarf galaxies
James W. Johnson, Christopher S. Kochanek, K. Z. Stanek
The scaling of the specific Type Ia supernova (SN Ia) rate with host galaxy stellar mass as measured in ASAS-SN and DES strongly s…
Dwarf galaxy archaeology from chemical abundances and star formation histories
James W. Johnson, Charlie Conroy, Benjamin D. Johnson +8
We model the stellar abundances and ages of two disrupted dwarf galaxies in the Milky Way stellar halo: Gaia-Sausage Enceladus (GSE) and Wukong/LMS-1. Using a statistically robust…
Birth of the Galactic Disk Revealed by the H3 Survey
Charlie Conroy, David H. Weinberg, Rohan P. Naidu +12
We use chemistry ([alpha/Fe] and [Fe/H]), main sequence turnoff ages, and kinematics determined from H3 Survey spectroscopy and Gaia astrometry to identify the birth of the Galacti…
Empirical Constraints on the Nucleosynthesis of Nitrogen
James W. Johnson, David H. Weinberg, Fiorenzo Vincenzo +2
We derive empirical constraints on the nucleosynthetic yields of nitrogen by incorporating N enrichment into our previously developed and empirically tuned multi-zone galactic chem…
Residual Abundances in GALAH DR3: Implications for Nucleosynthesis and Identification of Unique Stellar Populations
Emily J. Griffith, David H. Weinberg, Sven Buder +3
We investigate the [X/Mg] abundances of 16 elements for 82,910 Galactic disk stars from GALAH+ DR3. We fit the median trends of low-Ia and high-Ia populations with a two-process mo…
CNO dredge-up in a sample of APOGEE/Kepler red giants: Tests of stellar models and Galactic evolutionary trends of N/O and C/N
Fiorenzo Vincenzo, David H. Weinberg, Josefina Montalbán +8
Surface abundances of C, N, and O in red giants are affected by processed material mixed into the stars' convective envelopes. Using a sample of stars with elemental ab…