135 citations · 596 across the 24 of their papers we have counts for
5 papers · 1 filter
A possible mechanism for multiple changing look phenomenon in Active Galactic Nuclei
M. Sniegowska, B. Czerny, E. Bon +1
Changing-look phenomenon observed now in a growing number of active galaxies challenges our understanding of the accretion process close to a black hole. We propose a simple explan…
Optical spectral properties of radio loud quasars along the main sequence
A. del Olmo, P. Marziani, V. Ganci +4
We analyze the optical properties of Radio-Loud quasars along the Main Sequence (MS) of quasars. A sample of 355 quasars selected on the basis of radio detection was obtained by cr…
The quasar main sequence and its potential for cosmology
P. Marziani, D. Dultzin, A. Del Olmo +10
The main sequence offers a method for the systematization of quasar spectral properties. Extreme FeII emitters (or extreme Population A, xA) are believed to be sources accreting ma…
Extreme quasars as distance indicators in cosmology
D. Dultzin, P. Marziani, J. A. de Diego +7
Quasars accreting matter at very high rates (known as extreme Population A [xA] quasars, possibly associated with super-Eddington accreting massive black holes) may provide a new c…
Selection of highly-accreting quasars: Spectral properties of FeII emitters not belonging to extreme Population A
N. Bon, P. Marziani, E. Bon +5
The quasar class of extreme Population A (xA) (also known as super-Eddington accreting massive black holes, SEAMBHs) has been hailed as potential distance indicators for cosmology.…