101 citations · 773 across the 20 of their papers we have counts for
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Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius-luminosity relation luminosity distances
Narayan Khadka, Michal Zajaček, Raj Prince +5
We use measurements of 59/58 quasars (QSOs), over a redshift range , to do a comparative study of the radius--luminosity () and X-rayUV luminosity…
Accretion disks, quasars and cosmology: meandering towards understanding
Bozena Czerny, Shulei Cao, Vikram Kumar Jaiswal +11
As Setti & Woltjer noted back in 1973, quasars could be used to construct the Hubble diagram but the actual application was not that straightforward. It took years to implement the…
Consistency study of high- and low-accreting Mg ii quasars: No significant effect of the Fe ii to Mg ii flux ratio on the radius-luminosity relation dispersion
Narayan Khadka, Michal Zajaček, Swayamtrupta Panda +2
We use observations of 66 reverberation-measured \Mgii\ quasars (QSOs) in the redshift range -- a subset of the 78 QSOs we previously studied that also hav…
Using quasar and gamma-ray burst measurements to constrain cosmological dark energy models
Narayan Khadka
Observational evidence for the accelerated expansion of the universe requires dark energy for its explanation if general relativity is an accurate model of gravity. However, dark e…