Tracing the evolution of the cool gas in CGM and IGM environments through Mg II absorption from redshift z=0.75 to z=1.65 using DESI-Y1 data

X. Wu, Z. Cai, T. -W. Lan +35

We present a measurement of the mean absorption of cool gas traced by Mg II ($\hat{I}»\hat{I}»2796,2803$) around emission line galaxies (ELGs), spanning spatial scales from 20 kpc to 10 Mpc…