80 citations · 86 across the 10 of their papers we have counts for
10 papers
The Galactic Phosphorus Survey. I. Chemical Evolution across the Galactic Disk from 750 FGK Stars
Dionysios Gakis, Keith Hawkins, Zachary G. Maas +5
Phosphorus (P) is an odd- element produced primarily in massive stars and is also important for planetary chemistry as an element essential to life. However, its evolution over…
Barium Stars Across the Milky Way: Probing Their Origins via the GALAH Survey
Jaden Levine, Catherine Manea, Keith Hawkins +4
Barium stars are unusually enriched in barium ([Ba/Fe] >= 1.0 dex) and not predicted by current Galactic chemical evolution models. Previous observations of barium stars have found…
Dynamical Origins of Azimuthal Metallicity Variations in the Galactic Disk: Insights from Kinematic Ridges with Gaia
Carlos Jurado, Keith Hawkins, Jason A. S. Hunt +4
Kinematic and spectroscopic studies in the past few years have revealed coherent azimuthal metallicity variations across the Milky Way's disk that may be the result of dynamical pr…
A Detailed Chemical Analysis of the Red Giant Orbiting the Black Hole BH3: From Lithium to Thorium
Zoe Hackshaw, Keith Hawkins, Catherine Manea
Preliminary astrometric data from the fourth data release of the mission revealed a 33 M dark companion to a metal-poor red giant star, deemed BH3. This sys…
Exploring the History of Stellar Mergers with Chemistry: Examining the Origins of Massive -Enriched Stars using Carbon Isotope Ratios
Zachary G. Maas, Keith Hawkins, Jeffrey M. Gerber +2
Recently discovered massive -enriched (MAE) stars have surface chemistry consistent with members of the older thick disk Milky Way population but high masses ( 1.5 - 3 M$_…
Optical Spectroscopy Reveals Hidden Neutron-capture Elemental Abundance Differences among APOGEE-identified Chemical Doppelgängers
Catherine Manea, Melissa Ness, Keith Hawkins +9
Grouping stars by chemical similarity has the potential to reveal the Milky Way's evolutionary history. The APOGEE stellar spectroscopic survey has the resolution and sensitivity f…
[X/Fe] Marks the Spot: Mapping Chemical Azimuthal Variations in the Galactic Disk with APOGEE
Zoe Hackshaw, Keith Hawkins, Carrie Filion +4
Chemical cartography of the Galactic disk provides insights to its structure and assembly history over cosmic time. In this work, we use chemical cartography to explore chemical gr…
Chemical Doppelgangers in GALAH DR3: the Distinguishing Power of Neutron-Capture Elements Among Milky Way Disk Stars
Catherine Manea, Keith Hawkins, Melissa K. Ness +3
The observed chemical diversity of Milky Way stars places important constraints on Galactic chemical evolution and the mixing processes that operate within the interstellar medium.…
ELemental abundances of Planets and brown dwarfs Imaged around Stars (ELPIS): I. Potential Metal Enrichment of the Exoplanet AF Lep b and a Novel Retrieval Approach for Cloudy Self-luminous Atmospheres
Zhoujian Zhang, Paul Mollière, Keith Hawkins +10
AF Lep A+b is a remarkable planetary system hosting a gas-giant planet that has the lowest dynamical mass among directly imaged exoplanets. We present an in-depth analysis of the a…
Gaia FGK Benchmark stars: Opening the black box of stellar element abundance determination
P. Jofre, U. Heiter, C. C. Worley +10
Gaia and its complementary spectroscopic surveys combined will yield the most comprehensive database of kinematic and chemical information of stars in the Milky Way. The Gaia FGK b…