The near-UV NH3360 feature has been measured in a sample of 35 early-type galaxies spanning a wide range of masses and environments. We found that, contrary to...
New narrow band images of NGC 4151, taken in excellent seeing conditions with the 4.2-m William Herschel Telescope on La Palma are presented. These reveal a...
The connection between the low polarization quasar 3C 273 and blazars
Photopolarimetric observations in UBVRI bands and near-infrared photometric observations of the low polarization quasar 3C 273 obtained between February 1989...
We present the results of a near-infrared imaging study of the host galaxies of 17 quasars in the redshift range 1 RLQ(host)=-27.55+/-0.12 and K>RLQ(host)=-26...
The curious activity in the nucleus of NGC 4151: jet interaction causing variability?
A key characteristic of many active galactic nuclei (AGNs) is their variability, but its origin is poorly understood, especially in the radio domain. Williams...
The demographics of obscured AGN from X-ray spectroscopy guided by multiwavelength information
A complete census of active galactic nuclei (AGNs) is a prerequisite for understanding the growth of supermassive black holes across cosmic time. A significant...
The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
A key component of the Dark Energy Spectroscopic Instrument (DESI) survey validation (SV) is a detailed visual inspection (VI) of the optical spectroscopic data...
The diverse cold molecular gas contents, morphologies, and kinematics of type-2 quasars as seen by ALMA
We present CO(2−1) and adjacent continuum observations of seven nearby radio-quiet type-2 quasars (QSO2s) obtained with ALMA at ∼0.2″ resolution (370 pc at z ∼...
The dust masses of powerful radio galaxies: clues to the triggering of their activity
We use deep Herschel Space Observatory observations of a 90 per cent complete sample of 32 intermediate-redshift 2Jy radio galaxies (0.05 z 0.7) with strong...