176 citations · 331 across the 34 of their papers we have counts for
4 papers · 1 filter
Building the high-redshift Hubble Diagram with quasars
Matilde Signorini, Guido Risaliti, Andrea Sacchi +2
Proceeding of the "HACK100" Conference, 6-10 June 2022, Trieste, Italy - In recent years, quasars have been shown to be reliable standardizable candles, thanks to the non-linear re…
Quasars as Standard Candles V. Evaluation of a 0.06 dex intrinsic dispersion in the LX-LUV relation
Matilde Signorini, Guido Risaliti, Elisabeta Lusso +4
A characteristic feature of quasars is the observed non-linear relationship between their monochromatic luminosities at rest-frame 2500 Å and 2 keV. This relationship is evident ac…
Quasars as Standard Candles IV. Analysis of the X-ray and UV indicators of the disc-corona relation
Matilde Signorini, Guido Risaliti, Elisabeta Lusso +4
Context: A non-linear relation between quasar monochromatic luminosities at 2500A and 2 keV holds at all observed redshifts and luminosities, and it has been used to derive quasar…
Non-parametric analysis of the Hubble Diagram with Neural Networks
Lorenzo Giambagli, Duccio Fanelli, Guido Risaliti +1
The recent extension of the Hubble diagram of Supernovae and quasars to redshifts much higher than 1 prompted a revived interest in non-parametric approaches to test cosmological m…