380 citations · 1.3k across the 15 of their papers we have counts for
15 papers
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…
Quasars as high-redshift standard candles
Guido Risaliti, Elisabeta Lusso, Emanuele Nardini +5
In the past few years, we built a Hubble diagram of quasars up to redshift z7, based on the nonlinear relation between quasars' x-ray and UV luminosities. Such a Hubble diagr…
Quasars as high-redshift standard candles
A. Sacchi, G. Risaliti, M. Signorini +10
The non-linear relation between the X-ray and ultraviolet (UV) luminosity in quasars has been used to derive quasar distances and to build a Hubble diagram at redshifts up to $z\si…
Quasar cosmology: dark energy evolution and spatial curvature
G. Bargiacchi, M. Benetti, S. Capozziello +3
We analyse some open debates in cosmology in light of the most updated quasar (QSO) sample, covering a wide redshift range up to , combined with type Ia supernovae (SNe)…
MAGNUM survey: A MUSE-Chandra resolved view on ionized outflows and photoionization in the Seyfert galaxy NGC 1365
G. Venturi, E. Nardini, A. Marconi +24
Ionized outflows, revealed by broad asymmetric wings of the [OIII] line, are commonly observed in AGN but the low intrinsic spatial resolution of observations has generally prevent…
The 500 ks Chandra observation of the z = 6.31 QSO SDSS J1030+0524
R. Nanni, R. Gilli, C. Vignali +23
We present the results from a ks Chandra observation of the QSO SDSS J1030+0524. This is the deepest X-ray observation to date of a QSO. The QSO is dete…