282 citations · 1.3k across the 39 of their papers we have counts for
4 papers · 1 filter
Low- and high-z highly accreting quasars in the 4D Eigenvector 1 context
Paola Marziani, Jack W. Sulentic, C. Alenka Negrete +4
Highly accreting quasars are characterized by distinguishing properties in the 4D eigenvector 1 parameter space that make them easily recognizable over a broad range range of redsh…
UV spectral diagnostics for low redshift quasars: estimating physical conditions and radius of the Broad Line Region
P. Marziani, J. W. Sulentic, C. A. Negrete +5
The UV spectral range (1100 - 3000 A) contains the strongest resonance lines observed in active galactic nuclei (AGN). Analysis of UV line intensity ratios and profile shapes in qu…
GTC Spectra of z ~ 2.3 Quasars: Comparison with Local Luminosity Analogues
Jack W. Sulentic, Paola Marziani, Ascensión del Olmo +3
[Abridged] Context: The advent of 8-10m class telescopes makes possible for the first time detailed comparison of quasars with similar luminosity and very different redshifts. Aims…
A new method to obtain the Broad Line Region size of high redshift quasars
C. A. Negrete, D. Dultzin, P. Marziani +1
We present high S/N UV spectra for eight quasars at z 3 obtained with VLT/FORS. The spectra enable us to analyze in detail the strong and weak emission features in the rest-…