323 citations · 4.9k across the 142 of their papers we have counts for
149 papers
Spectral variability studies in Active Galactic Nuclei: Exploring continuum and emission line regions in the age of LSST and JWST
Swayamtrupta Panda, Paola Marziani, Bozena Czerny +2
The investigation of emission line regions within active galaxies (AGNs) has a rich and extensive history, now extending to the use of AGNs and quasars as "standardizable" cosmolog…
Optical and near-UV spectroscopic properties of low-redshift jetted quasars in the main sequence context
Shimeles Terefe, Ascensión Del Olmo, Paola Marziani +4
This paper presents new optical and near-UV spectra of 11 extremely powerful jetted quasars, with radio to optical flux density ratio 10, that concomitantly cover the low-i…
Saturation of the curve -- diagnostics of the continuum and H emission in Population B active galaxy NGC 5548
Swayamtrupta Panda, Edi Bon, Paola Marziani +1
NGC 5548 has been hailed as an archetypical type-1 active galactic nuclei (AGN) and serves as a valuable laboratory to study the long-term variation of its broad-line region (BLR).…
Modelling the quasar spectra for super-Eddington sources -- The What, the Why and the How
Swayamtrupta Panda, Paola Marziani
Broad lines in active galaxies are primarily emitted by photoionization processes that are driven by the incident continuum arising from a complex geometrical structure circumscrib…
BAL effect in quasars due to source orientation
M. Sniegowska, M. H. Naddaf, M. L. Martinez-Aldama +3
We investigated a scenario where the presence of a broad absorption line (BAL) feature in quasars (QSOs) is contingent upon the line of sight being situated within an outflow cone…
Long-term optical spectral monitoring of a changing-look active galactic nucleus NGC 3516 -- II. Broad-line profile variability
Luka C. Popović, Dragana Ilić, Alexander Burenkov +10
We analyze the broad H line profile variability of the "changing look" active galactic nucleus (CL-AGN) NGC 3516 over a long period of 25 years. The observed change in the broad…