Joel Leja

Campbell Collaboration — Norway

Physics and Astronomy · Physical Sciences

55h-index10.3kcitations307works18.02yr avg
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Research Topics

Astronomy and Astrophysical Research(183), Galaxies: Formation, Evolution, Phenomena(182), Stellar, planetary, and galactic studies(90), Gamma-ray bursts and supernovae(83), Astrophysical Phenomena and Observations(42)

Publications307 total

On the Significance of Covariance for Constraining Theoretical Models from Galaxy Observables
The Astrophysical Journal·2026Open Access
RUBIES Spectroscopically Confirms the High Number Density of Quiescent Galaxies from <b>2</b> &lt; <i>z</i> &lt; 5
The Astrophysical Journal·2026Open Access
Dark Energy Survey Year 6 Results: Weak Lensing and Galaxy Clustering Cosmological Analysis Framework
arXiv (Cornell University)·2026Open Access
Ionizing Photon Production Efficiencies and Chemical Abundances at Cosmic Dawn Revealed by Ultra-Deep Rest-Frame Optical Spectroscopy of JADES-GS-z14-0
arXiv (Cornell University)·2025Open Access
Ionizing Photon Production Efficiencies and Chemical Abundances at Cosmic Dawn Revealed by Ultra-Deep Rest-Frame Optical Spectroscopy of JADES-GS-z14-0
ArXiv.org·2025Open Access
The LEGA-C galaxy survey: Multiple quenching channels for quiescent galaxies at <i>z</i> ∼ 1
Astronomy and Astrophysics·2025· 1 citedOpen Access
The LEGA-C galaxy survey: multiple quenching channels for quiescent galaxies at $z\sim1$
ArXiv.org·2025Open Access
Rapid, out-of-equilibrium metal enrichment indicated by a flat mass-metallicity relation at <i>z</i>   ∼  6 from NIRCam grism spectroscopy
Astronomy and Astrophysics·2025Open Access
The Mass-Metallicity Relation and its Observational Effects at z~3-6
arXiv (Cornell University)·2025Open Access
Probing neutral outflows in <i>z</i>   ∼  2 galaxies using JWST observations of Ca II H and K absorption lines
Astronomy and Astrophysics·2025· 1 citedOpen Access
Impact of redshift distribution uncertainties on Lyman-break galaxy cosmological parameter inference
Monthly Notices of the Royal Astronomical Society·2025Open Access
<i>α</i> -MC: Self-consistent <i>α</i> -enhanced Stellar Population Models Covering a Wide Range of Age, Metallicity, and Wavelength
The Astrophysical Journal·2025· 2 citedOpen Access
Optical Strong Line Ratios Cannot Distinguish between Stellar Populations and Accreting Black Holes at High Ionization Parameters and Low Metallicities
The Astrophysical Journal·2025· 1 citedOpen Access
LEGA-C stellar populations scaling relations. II: Dissecting mass-complete archaeological trends and their evolution since z~0.7 with LEGA-C and SDSS
arXiv (Cornell University)·2025Open Access
JWST/NIRSpec Reveals a Small Population of Dominant Dust-Obscured Ionizing Sources in Galaxies at 1 &lt; z &lt; 3
arXiv (Cornell University)·2025Open Access
<tt>pop-cosmos</tt> : Insights from Generative Modeling of a Deep, Infrared-selected Galaxy Population
The Astrophysical Journal·2025· 2 citedOpen Access
The Structure and Formation Histories of Low-mass Quiescent Galaxies in the A2744 Cluster Environment
The Astrophysical Journal·2025· 2 citedOpen Access
Rapid, out of equilibrium metal enrichment indicated by a flat mass-metallicity relation at z~6 from NIRCam grism spectroscopy
arXiv (Cornell University)·2025Open Access
The slope and scatter of the star forming main sequence at z~5 : reconciling observations with simulations
arXiv (Cornell University)·2025Open Access
Discovery of red galaxy candidates at z ~ 12: Early dust growth or significant nebular emission with high-temperature stars?
arXiv (Cornell University)·2025Open Access
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Frequent Co-authors

Katherine E. Whitaker(32), Gabriel Brammer(32), Pieter van Dokkum(31), Erica J. Nelson(28), Rachel Bezanson(27), Ivo Labbé(25), Pascal A. Oesch(19), Marijn Franx(18), Bingjie Wang(18), Sedona H. Price(17), John R. Weaver(15), David J. Setton(14), Jenny E. Greene(14), Danilo Marchesini(14), Christina C. Williams(13), Lukas J. Furtak(12), Hakim Atek(12), Richard Pan(12), Adi Zitrin(12), Katherine A. Suess(11)