3 papers
astro-ph.GA2026
Three Hundred Quasars from the Couch: A first look at high-redshift quasar discovery with SPHEREx
Frederick B. Davies, Sarah E. I. Bosman, Arpita Ganguly +9
Photometric selection of luminous high-redshift () quasars is plagued by contamination from numerous low-mass Galactic stars, reddened lower-redshift quasars, as well as…
astro-ph.GA2026
E-XQR-30: Evidence for an Increase in the Ionization State of Metal Absorbers from z~6 to z~2
Stephanie Rowlands, R. L. Davies, E. Ryan-Weber +15
We investigate the evolution of the ionization state of metal-enriched gas in and around galaxies near the epoch of reionization using a sample of 488 metal absorption systems at 4…
astro-ph.GA2025
QUEST (Quasar Unsupervised Encoder and Synthesis Tool): A machine learning framework to generate quasar spectra
F. Guarneri, J. T. Schindler, R. A. Meyer +5
Quasars at the redshift frontier (z > 7.0) are fundamental probes of black hole (BH) growth and evolution but notoriously difficult to identify. At these redshifts, machine learnin…