Anton M. Koekemoer

Space Telescope Science Institute — United States

Physics and Astronomy · Physical Sciences

145h-index83.0kcitations1.7kworks10.92yr avg
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Research Topics

Galaxies: Formation, Evolution, Phenomena(1046), Astronomy and Astrophysical Research(1027), Gamma-ray bursts and supernovae(425), Stellar, planetary, and galactic studies(365), Astrophysical Phenomena and Observations(252)

Publications1.7k total

Expanding the High-z Supernova Frontier: "Wide-Area" JWST Discoveries from the First Two Years of COSMOS-Web
arXiv (Cornell University)·2026Open Access
Galaxy mergers in the epoch of reionization – II. Merger-triggered star formation and AGN activities at <i>z</i> = 4.5−8.5
Monthly Notices of the Royal Astronomical Society·2026· 5 citedOpen Access
Mysteries of <i>Capotauro</i> : Investigating the puzzling nature of an extreme F356W-dropout
Astronomy and Astrophysics·2026Open Access
Globular Clusters in the Galaxy Cluster MACS0416 at <i>z</i>  = 0.397
The Astronomical Journal·2025Open Access
COSMOS Spectroscopic Redshift Compilation (First Data Release): 488,000 Redshifts Encompassing Two Decades of Spectroscopy
The Astrophysical Journal Supplement Series·2025· 9 citedOpen Access
The <i>N</i> <sub>H</sub> Distribution of Hard X-Ray Selected Active Galactic Nuclei in the NEP Field
The Astrophysical Journal·2025Open Access
The SDSS-V Black Hole Mapper Reverberation Mapping Project: Light Echoes of the Coronal-line Region in a Luminous Quasar
The Astrophysical Journal·2025Open Access
THRILS -- The High-(Redshift+Ionization) Line Search: Program Description &amp; Redshift Catalog
arXiv (Cornell University)·2025Open Access
Resolving the ionizing photon budget crisis with JWST/NIRCam HII clumping constraints at z=6
arXiv (Cornell University)·2025Open Access
Dissecting Reionization with the Cosmic Star Formation and Active Galactic Nuclei Luminosity History
The Astrophysical Journal·2025Open Access
EPOCHS. III. Unbiased UV Continuum Slopes at 6.5 &lt; <i>z</i> &lt; 13 from Combined PEARLS GTO and Public JWST/NIRCam Imaging
The Astrophysical Journal·2025Open Access
Clumpiness of galaxies revealed in the near-infrared with COSMOS-Web
Astronomy and Astrophysics·2025Open Access
Discovery of a Little Red Dot Candidate at <i>z</i>  ≳ 10 in COSMOS-web Based on MIRI-NIRCam Selection
The Astrophysical Journal·2025· 1 citedOpen Access
COSMOS-Web: Unraveling the Evolution of Galaxy Size and Related Properties at 2 &lt; <i>z</i> &lt; 10
The Astrophysical Journal Supplement Series·2025· 4 citedOpen Access
Testing Photometric Techniques for Measuring the Rest-frame UV Spectral Slope against JWST PRISM Spectroscopy
The Astrophysical Journal·2025Open Access
ALMA Lensing Cluster Survey: Molecular Gas Properties of Line-Emitting Galaxies from a Blind Survey
arXiv (Cornell University)·2025Open Access
Beyond the Monsters: A More Complete Census of Black Hole Activity at Cosmic Dawn
ArXiv.org·2025Open Access
PRIMER and JADES reveal an abundance of massive quiescent galaxies at <b> 2 &amp;lt;   <i>z</i>  &amp;lt;  5 </b>
Monthly Notices of the Royal Astronomical Society·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
<b>E</b> mission-line Diagnostics at <i>z</i>  &gt; 4: [O <scp>iii</scp> ] <i>λ</i> 4364/H <i>γ</i> versus [Ne <scp>iii</scp> ] <i>λ</i> 3870/[O <scp>ii</scp> ] <i>λ</i> 3730
The Astrophysical Journal·2025Open Access
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Frequent Co-authors

Jeyhan S. Kartaltepe(16), P. Capak(16), Norman A. Grogin(15), Mauro Giavalisco(15), Bahram Mobasher(15), M. Salvato(15), S. J. Lilly(13), H. J. McCracken(13), Dale D. Kocevski(12), A. Renzini(12), O. Ilbert(12), D. B. Sanders(12), Jean‐Paul Kneib(12), G. Hasinger(12), I Tereno(12), Henry C. Ferguson(11), Arjen van der Wel(11), G. Zamorani(11), V. Mainieri(11), Eric F. Bell(10)