69 citations · 580 across the 27 of their papers we have counts for
4 papers · 1 filter
Standardizing reverberation-measured Mg II time-lag quasars, by using the radius-luminosity relation, and constraining cosmological model parameters
Narayan Khadka, Zhefu Yu, Michal Zajaček +3
We use 78 reverberation-measured Mg II time-lag quasars (QSOs) in the redshift range to constrain cosmological parameters in six different cosmological mo…
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…
Can reverberation-measured quasars be used for cosmology?
Mary Loli Martínez-Aldama, Bożena Czerny, Damian Kawka +4
Quasars have been proposed as a new class of standard candles analogous to Supernovae, as their large redshift range and high luminosities make them excellent candidates. Reverbera…
Low Ionization Emission Lines in Quasars: Clues from OI 8446 and the CaII Triplet
Paola Marziani, Mary Loli Martinez-Aldama, Deborah Dultzin +1
The formation of low emission lines in quasars and active galactic nuclei is still an open issue. Aided by the organizing power of the 4D eigenvector 1 scheme, we review basic deve…