The Stripe 82 1–2 GHz Very Large Array Snapshot Survey: host galaxy properties and accretion rates of radio galaxies by Whittam, I, Prescott, M, McAlpine, K, Jarvis, M, Heywood, I

“…Optical spectra are used to classify these sources as high excitation and low excitation radio galaxies (HERGs and LERGs), resulting in 60 HERGs, 149 LERGs, and 600 ‘probable LERGs’. …”

GAMA/WiggleZ: The 1.4GHz radio luminosity functions of high- and low-excitation radio galaxies and their redshift evolution to z=0.75 by Pracy, M, Ching, J, Sadler, E, Croom, S, Baldry, I, Bland-Hawthorn, J, Brough, S, Brown, M, Couch, W, Davis, T, Drinkwater, M, Jarvis, M, Jelliffe, B, Jurek, R, Loveday, J, Pimbblet, K, Prescott, M, Wisnioski, E, Woods, D

“…The radio AGN are separated into low-excitation radio galaxies (LERGs) and high-excitation radio galaxies (HERGs) using the optical spectra. We derive radio luminosity functions for LERGs and HERGs separately in the three redshift bins (0.005 < z < 0.3, 0.3 < z < 0.5 and 0.5 < z < 0.75). …”

MIGHTEE: the nature of the radio-loud AGN population by Whittam, IH, Jarvis, MJ, Hale, CL, Prescott, M, Morabito, LK, Heywood, I, Adams, NJ, Afonso, J, An, F, Ao, Y, Bowler, RAA, Collier, JD, Deane, RP, Delhaize, J, Frank, B, Glowacki, M, Hatfield, PW, Maddox, N, Marchetti, L, Matthews, AM, Prandoni, I, Randriamampandry, S, Randriamanakoto, Z, Smith, DJB, Taylor, AR, Thomas, NL, Vaccari, M

“…We find no significant difference in the host galaxy properties of the HERGs and LERGs in our sample. In contrast to previous work, we find that the HERGs and LERGs have very similar Eddington-scaled accretion rates; in particular we identify a population of very slowly accreting AGNs that are formally classified as HERGs at these low radio luminosities, where separating into HERGs and LERGs possibly becomes redundant. …”

The Stripe 82 1-2 GHz Very Large Array Snapshot Survey: multiwavelength counterparts by Prescott, M, Whittam, I, Jarvis, M, McAlpine, K, Richter, L, Fine, S, Mauch, T, Heywood, I, Vaccari, M

“…For the objects with spectroscopy, we separate radio-loud active galactic nuclei (AGN) and star-forming galaxies (SFGs) using three diagnostics and then further divide our radio-loud AGN into the high and low excitation radio galaxy (HERG and LERG) populations. A control-matched sample of HERGs and LERGs, matched on stellar mass, redshift, and radio luminosity, reveals that the host galaxies of LERGs are redder and more concentrated than HERGs. …”