17 citations · 31 across the 18 of their papers we have counts for
19 papers
Mapping the Quasar Main Sequence in the UV range: A Connection with the UV Fe III Emission
D. Martínez Collipal, M. L. Martínez-Aldama, A. Pandey +3
The quasar main sequence (MS) provides a consistent unification scheme for type I AGNs. This framework, constructed from the relative flux between the optical emissions $\mathrm{H}…
Observations of a Possible Transient Magnetically Arrested Accretion State in a Nearby Quasar: OQ208
Brian Punsly, Cormac Reynolds, Paola Marziani +12
OQ208 is a nearby, partially obscured quasar (z=0.077) that is a young, bright, parsec scale radio source. We assemble archival and new high frequency VLBA and VLA observations and…
Preliminary cosmological results using extreme accretors Quasar formalism
Rodrigo Sandoval-Orozco, Castalia Alenka Negrete, Paola Marziani +1
We revisited the xA Quasar formalism from the cosmological point of view, where a completely cleaned and standardized sample is compiled from different literature references. This…
Spectral Evolution and Transient Broad-Line Features in the Isolated AGN UNAM-KIAS 613
Edgar Cortes-Suárez, Paola Marziani, Héctor Manuel Hernández-Toledo +2
We present multi-epoch optical spectroscopy of the isolated elliptical galaxy UNAM-KIAS 613, hosting a low-luminosity Type 1 AGN. Analysis of archival Sloan Digital Sky Survey (SDS…
Investigating the origin of radio emission in candidate super-Eddington accreting black holes
Marie-Lou Gendron-Marsolais, Paola Marziani, Marco Berton +8
Recent works show that the radio power of quasars accreting at very high rates can reach surprisingly high values. These studies suggest that this radio emission might originate fr…
AGN Variability with Rubin Observatory in the 2030s
Swayamtrupta Panda, Francisco Pozo Nuñez, Hygor Benati Gonçalves +4
AGN variability offers a direct probe of accretion physics, disk structure, and black hole growth, but progress has been limited by sample size, cadence heterogeneity, and photomet…
Evidence for a Stratified Accretion Disk Wind in AGN
P. Marziani, E. Bon, S. Panda +5
We present observational evidence supporting the presence of a stratified accretion disk wind in active galactic nuclei (AGN), based on multi-wavelength spectroscopic analysis of b…
The Disk Plus (Failed) Wind System of 3C 47: A Story of Accretion Disks and Binary Black Holes
P. Marziani, S. Terefe Mengistue, A. del Olmo +9
[Abridged] Optically thick, geometrically thin accretion disks around supermassive black holes are thought to contribute to broad-line emission in type-1 active galactic nuclei (AG…
Quasar Main Sequence unfolded by 2.5D FRADO (Natural expression of Eddington ratio, black hole mass, and inclination)
M. H. Naddaf, M. L. Martínez-Aldama, P. Marziani +2
The quasar main sequence (QMS), characterized by the Eigenvector 1 (EV1), serves as a unifying framework for classifying type-1 active galactic nuclei (AGNs) based on their diverse…
The spectral energy distribution of extreme population A quasars
Karla Garnica, Deborah Dultzin, Paola Marziani +1
Knowledge of the broad-band active galactic nuclei (AGN) spectral energy distribution (SED) that ionizes the gas-rich broad emission line region is key to understanding the various…
LBT IR observations of candidate super-Eddington quasars
T. M. Buendia-Rios, P. Marziani, C. A. Negrete +1
Quasars accreting at very high rates are believed to be prime movers of galactic evolution because of their high radiative and mechanical output. The study presented in this paper…
Super-Eddington Accretion in Quasars
P. Marziani, K. Garnica Luna, A. Floris +5
This review provides an observational perspective on the fundamental properties of super-Eddington accretion onto supermassive black holes in quasars. It begins by outlining the se…
Dark and bright sides of the Broad Line Region clouds as seen in the FeII emission of SDSS RM 102
Alberto Floris, Ashwani Pandey, Bozena Czerny +4
Contamination from singly ionized iron emission is one of the greatest obstacles to determining the intensity of emission lines in the UV and optical wavelength ranges. This study…
Exploring the links between quasar winds and radio emission along the Main Sequence at high redshift
A. Deconto-Machado, A. del Olmo, P. Marziani
Despite the increasing prevalence of RL sources at cosmic noon, our understanding of the underlying physics that governs the accretion disc outflows in these particular sources and…
The extremes of AGN variability: outbursts, deep fades, changing looks, exceptional spectral states, and semi-periodicities
S. Komossa, D. Grupe, P. Marziani +16
The extremes of Active Galactic Nuclei (AGN) variability offer valuable new insights into the drivers and physics of AGN. We discuss some of the most extreme cases of AGN variabili…
Chemical abundances along the quasar main sequence
A. Floris, P. Marziani, S. Panda +5
The 4D eigenvector 1 (E1) sequence has emerged as a powerful tool for organizing the observational and physical characteristics of type-1 active galactic nuclei (AGNs). In this stu…
The power of relativistic jets: a comparative study
Luigi Foschini, Benedetta Dalla Barba, Merja Tornikoski +7
We present the results of a comparison between different methods to estimate the power of relativistic jets from active galactic nuclei (AGN). We selected a sample of 32 objects (2…
The Quasar 3C 47: Extreme Population B Jetted Source With Double-peaked Profile
Shimeles Terefe Mengistue, Paola Marziani, Ascensión del Olmo +3
Context. An optically thick, geometrically thin accretion disk (AD) around a supermassive black hole might contribute to broad-line emission in type-1 active galactic nuclei (AGN).…
From sub-solar to super-solar chemical abundances along the quasar main sequence
Paola Marziani, Alberto Floris, Alice Deconto-Machado +8
The 4D Eigenvector 1 sequence has proven to be a highly effective tool for organizing observational and physical properties of type 1 active galactic nuclei (AGN). In this paper, w…