Barišić IVan Der Wel ABezanson RPacifici CNoeske KMuñoz-Mateos J.CFranx MSmolčić VBell E.FBrammer GCalhau JChauké PVan Dokkum P.GVan Houdt JGallazzi ALabbé IMaseda M.VMuzzin ASobral DStraatman CPO-FENG WU2022-11-112022-11-1120170004637Xhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85030150499&doi=10.3847%2f1538-4357%2faa8768&partnerID=40&md5=237b060d686f88c83e9a5e2dbdc02635https://scholars.lib.ntu.edu.tw/handle/123456789/624934We investigate the stellar kinematics and stellar populations of 58 radio-loud galaxies of intermediate luminosities (at 0.6 < z < 1. This sample is constructed by cross-matching galaxies from the deep VLT/VIMOS LEGA-C spectroscopic survey with the VLA 3 GHz data set. The LEGA-C continuum spectra reveal for the first time stellar velocity dispersions and age indicators of z ∼ 1 radio galaxies. We find that z ∼ 1 radio-loud active galactic nucleus (AGN) occur exclusively in predominantly old galaxies with high velocity dispersions: σ > 175 km s-1, corresponding to black hole masses in excess of. Furthermore, we confirm that at a fixed stellar mass the fraction of radio-loud AGN at z 1 is five to 10 times higher than in the local universe, suggesting that quiescent, massive galaxies at z ∼ 1 switch on as radio AGN on average once every Gyr. Our results strengthen the existing evidence for a link between high black hole masses, radio loudness, and quiescence at 1. © 2017. The American Astronomical Society. All rights reserved.galaxies: evolution; galaxies: fundamental parameters; galaxies: high-redshift; galaxies: jets; galaxies: star formationjournal article10.3847/1538-4357/aa87682-s2.0-85030150499