International Gemini Observatory

A Decade-scale Ionization Echo of Black Hole Accretion in Galactic Nuclei

Abstract Circumnuclear structures in active galactic nuclei (AGN) respond to accretion variability over different spatial and temporal scales, but whether compact narrow-line gas responds on decade timescales has not been systematically established. We use repeat Sloan Digital Sk...

The “Fork” Geometry in the DESI Main Survey DR1: Implications of Target Selection for Galaxy Evolution Studies

Abstract The Dark Energy Spectroscopic Instrument (DESI) Main Survey Data Release 1 (DR1) provides an unprecedented spectroscopic view of galaxies and quasars across a large fraction of the observable Universe. However, the survey’s tracer-dependent targeting strategy introduces...