← back to search

Alexander P. Ji

University of Chicago · US
Area of research
Astronomy and Astrophysics · Instrumentation
Research interest
Research interests include Stellar, planetary, and galactic studies, Astronomy and Astrophysical Research, Astrophysics and Star Formation Studies, and Gamma-ray bursts and supernovae.
h-index
35
citations
5,105
works
191
NIH funding
primary concept
email

Recent publications

Discovery of an [Fe/H] ∼ −4.8 Star in Gaia XP Spectra<sup>*</sup>
The Astrophysical Journal Letters 2025cited by 11position: middledoi
The DECam MAGIC Survey: Spectroscopic Follow-up of the Most Metal-poor Stars in the Distant Milky Way Halo<sup>*</sup>
The Astrophysical Journal 2025cited by 8position: middledoi
Spectacular Nucleosynthesis from Early Massive Stars
The Astrophysical Journal Letters 2024cited by 24position: firstdoi
Enrichment by extragalactic first stars in the Large Magellanic Cloud
Nature Astronomy 2024cited by 21position: middledoi
Extending the chemical reach of the H3 survey: detailed abundances of the dwarf-galaxy stellar stream Wukong/LMS-1
Monthly Notices of the Royal Astronomical Society 2024cited by 19position: middledoi
Chemical Diversity on Small Scales: Abundance Analysis of the Tucana V Ultrafaint Dwarf Galaxy
The Astrophysical Journal 2024cited by 15position: middledoi
The <i>R</i>-Process Alliance: detailed chemical composition of an <i>r</i>-process enhanced star with UV and optical spectroscopy
Monthly Notices of the Royal Astronomical Society 2024cited by 15position: middledoi
A Population of Short-duration Gamma-Ray Bursts with Dwarf Host Galaxies
The Astrophysical Journal 2024cited by 14position: lastdoi
Reading between the (Spectral) Lines: Magellan/IMACS Spectroscopy of the Ultrafaint Dwarf Galaxies Eridanus IV and Centaurus I
The Astrophysical Journal 2024cited by 12position: middledoi
Multiple populations and a CH star found in the 300S globular cluster stellar stream
Monthly Notices of the Royal Astronomical Society 2024cited by 10position: middledoi
The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V
The Astrophysical Journal Supplement Series 2023cited by 250position: middledoi
<i>S</i>5: Probing the Milky Way and Magellanic Clouds potentials with the 6D map of the Orphan–Chenab stream
Monthly Notices of the Royal Astronomical Society 2023cited by 91position: middledoi
Stellar Properties of Observed Stars Stripped in Binaries in the Magellanic Clouds
The Astrophysical Journal 2023cited by 60position: middledoi
Pegasus IV: Discovery and Spectroscopic Confirmation of an Ultra-faint Dwarf Galaxy in the Constellation Pegasus
The Astrophysical Journal 2023cited by 46position: middledoi
Streams on FIRE: Populations of Detectable Stellar Streams in the Milky Way and FIRE
The Astrophysical Journal 2023cited by 39position: middledoi
Metal Mixing in the r-process Enhanced Ultrafaint Dwarf Galaxy Reticulum II*
The Astronomical Journal 2023cited by 35position: firstdoi
Detailed Chemical Abundances of Stars in the Outskirts of the Tucana II Ultrafaint Dwarf Galaxy*
The Astronomical Journal 2023cited by 33position: middledoi
Timing the r-process Enrichment of the Ultra-faint Dwarf Galaxy Reticulum II
The Astrophysical Journal 2023cited by 30position: middledoi
Metallicity Distribution Functions of 13 Ultra-faint Dwarf Galaxy Candidates from Hubble Space Telescope Narrowband Imaging
The Astrophysical Journal 2023cited by 30position: middledoi
200 000 candidate very metal-poor stars in <i>Gaia</i> DR3 XP spectra
Monthly Notices of the Royal Astronomical Society 2023cited by 28position: middledoi
Distant Echoes of the Milky Way’s Last Major Merger
The Astrophysical Journal 2023cited by 27position: middledoi
r-process Abundance Patterns in the Globular Cluster M92
The Astrophysical Journal 2023cited by 20position: middledoi
S <sup>5</sup>: The Orbital and Chemical Properties of One Dozen Stellar Streams
The Astrophysical Journal 2022cited by 91position: middledoi
Evidence from Disrupted Halo Dwarfs that r-process Enrichment via Neutron Star Mergers is Delayed by ≳500 Myr
The Astrophysical Journal Letters 2022cited by 64position: middledoi
The effect of the deforming dark matter haloes of the Milky Way and the Large Magellanic Cloud on the Orphan–Chenab stream
Monthly Notices of the Royal Astronomical Society 2022cited by 60position: middledoi
Public Release of A-SLOTH: Ancient Stars and Local Observables by Tracing Halos
The Astrophysical Journal 2022cited by 57position: middledoi
Horizons: nuclear astrophysics in the 2020s and beyond
Journal of Physics G Nuclear and Particle Physics 2022cited by 47position: middledoi
Simultaneous Constraints on the Star Formation History and Nucleosynthesis of Sculptor dSph
The Astrophysical Journal 2022cited by 34position: middledoi
The chemical abundance pattern of the extremely metal-poor thin disc star 2MASS J1808−5104 and its origins
Monthly Notices of the Royal Astronomical Society 2022cited by 30position: middledoi
Magellan/IMACS spectroscopy of Grus I: A low metallicity ultra-faint dwarf galaxy
arXiv (Cornell University) 2022cited by 24position: middledoi

Grants

Chemical Abundances of Halo Stars in the Sloan Digital Sky Survey V
NSF2510795$532,3272025–2028PIRePORTER
Metallicity Distributions of the Faintest Dwarf Galaxies
NSF2307599$459,2192023–2027PIRePORTER
Collaborative Research: Galactic Archaeology from Careful Modeling of Old Stars
NSF2206264$424,4752022–2025PIRePORTER

Frequent collaborators

Anna Frebel · Massachusetts Institute of Technology16 papers (2015–2025)Joshua D. Simon · California Institute of Technology13 papers (2016–2024)Ting S. Li · University of Arizona13 papers (2019–2024)Andrew B. Pace · University of Virginia12 papers (2019–2025)Anirudh Chiti · University of Chicago11 papers (2016–2025)S. E. Koposov · University of Edinburgh10 papers (2019–2024)D. B. Zucker · Macquarie University8 papers (2019–2024)Denis Erkal · University of Surrey8 papers (2019–2023)Geraint F. Lewis · The University of Sydney8 papers (2019–2024)Joss Bland‐Hawthorn · The University of Sydney8 papers (2019–2024)K. Kuehn · University of Nevada, Las Vegas7 papers (2019–2023)Nora Shipp · University of Washington7 papers (2019–2023)Lara R. Cullinane · Australian National University7 papers (2021–2024)G. S. Da Costa · Australian National University6 papers (2019–2024)Guilherme Limberg · University of Chicago6 papers (2023–2025)Mohammad K. Mardini · Massachusetts Institute of Technology5 papers (2022–2025)Terese T. Hansen · Stockholm University5 papers (2019–2024)Dougal Mackey · Australian National University5 papers (2019–2022)Vinicius M. Placco · University of Notre Dame4 papers (2022–2025)P. S. Ferguson · Texas A&M University4 papers (2021–2024)