Anton M. Koekemoer
5 papers ยท Latest:
Using Ly$ฮฑ$ Transmitted Spectrum to Probe IGM Transmission and Identify Ionized Structures in Cosmic Reionization
This paper uses JWST/NIRSpec to measure intergalactic medium transmission and identify a large ionized bubble during cosmic reionization.
PEARLS: Two Distinct Populations of AGN Hosts Moving Between Star Formation and Quiescence
This paper identifies two distinct populations of AGN host galaxies transitioning between star formation and quiescence, suggesting AGN activity drives star formation.
Two Exciting High-redshift Galaxy Candidates Turn Out to Be Two Exciting Ultra-cool Brown Dwarfs
Two high-redshift galaxy candidates observed by JWST were reclassified as ultra-cool brown dwarfs, highlighting potential contamination in deep surveys.
First Statistical Study of Over 100 Magnified Stellar Events at Redshift $z \approx 0.725$ with JWST
JWST enabled the first statistical study of over 100 magnified stars at zโ0.725 in the Dragon galaxy, revealing insights into stellar populations and dark matter.
Prevailing thermally-pulsing-asymptotic-giant branch stars in the near-infrared rest-frame spectra of distant quiescent galaxies: towards robust galaxy ages and masses
JWST observations confirm the prevalence of TP-AGB stars in distant quiescent galaxies, improving stellar population models and age/mass estimates.
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