282 citations · 1.3k across the 39 of their papers we have counts for
5 papers · 1 filter
Highly accreting quasars: The SDSS low-redshift catalog
C. A. Negrete, D. Dultzin, P. Marziani +8
The most highly accreting quasars (xA) are of special interest in studies of the physics of AGNs and host galaxy evolution. Quasars accreting at high rates (L/LEdd 1) hold p…
Narrow-line Seyfert 1s: what is wrong in a name?
P. Marziani, A. del Olmo, M. D' Onofrio +6
Narrow-line Seyfert 1s (NLSy1s) are an ill-defined class. Work done over the past 20 years as well as recent analyses show a continuity in properties (e.g., Balmer line profiles, b…
Extreme quasars at high redshift
M. L. Martınez-Aldama, A. Del Olmo, P. Marziani +5
Context:Quasars radiating at extreme Eddington ratios (xA) are likely a prime mover of galactic evolution and have been hailed as potential distance indicators. Their properties ar…
A main sequence for quasars
P. Marziani, D. Dultzin, J. W. Sulentic +7
The last 25 years saw a major step forward in the analysis of optical and UV spectroscopic data of large quasar samples. Multivariate statistical approaches have led to the definit…
HE0359-3959: an extremely radiating quasar
M. L. Martínez-Aldama, A. Del Olmo, P. Marziani +3
We present a multiwavelength spectral study of the quasar HE0359-3959, which has been identified as an extreme radiating source at intermediate redshift (z=1.5209). Along the spect…