High-ionization coronal lines trace quasar-like activity in recently quenched galaxies at high redshift

F. Valentino, K. Ito, M. Farcy +31

We report the detection of the high-ionization line [NeV]$\hat{I}»$3427 in the JWST/NIRSpec archival spectra of 6 massive quenched galaxies at $z\sim 1.5-4.5$, identified from a parent…