, , and other constraints from lower-redshift, non-CMB, expansion-rate data
We use updated type Ia Pantheon+ supernova, baryon acoustic oscillation, and Hubble
parameter (now also accounting for correlations) data, as well as new reverberation …
parameter (now also accounting for correlations) data, as well as new reverberation …
High Eddington quasars as discovery tools: Current state and challenges
S Panda, P Marziani - Frontiers in Astronomy and Space Sciences, 2023 - frontiersin.org
A landmark of accretion processes in active galactic nuclei (AGN) is the continuum
originating from a complex structure, ie, an accretion disk and a corona around a …
originating from a complex structure, ie, an accretion disk and a corona around a …
Using lower redshift, non-CMB, data to constrain the Hubble constant and other cosmological parameters
We use updated Hubble parameter and baryon acoustic oscillation data, as well as other
lower redshift Type Ia supernova, Mg ii reverberation-measured quasar, quasar angular …
lower redshift Type Ia supernova, Mg ii reverberation-measured quasar, quasar angular …
Standardizing Platinum Dainotti-correlated gamma-ray bursts, and using them with standardized Amati-correlated gamma-ray bursts to constrain cosmological model …
We show that the Platinum gamma-ray burst (GRB) data compilation, probing the redshift
range 0.553≤ z≤ 5.0, obeys a cosmological-model-independent three-parameter …
range 0.553≤ z≤ 5.0, obeys a cosmological-model-independent three-parameter …
Past, Present, and Future of the Scaling Relations of Galaxies and Active Galactic Nuclei
M D'Onofrio, P Marziani, C Chiosi - Frontiers in Astronomy and Space …, 2021 - frontiersin.org
We review the properties of the established Scaling Relations (SRs) of galaxies and active
galactic nuclei (AGN), focusing on their origin and expected evolution back in time, providing …
galactic nuclei (AGN), focusing on their origin and expected evolution back in time, providing …
Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius–luminosity relation luminosity distances
We use measurements of 59/58 quasars (QSOs), over a redshift range 0.0041≤ z≤ 1.686,
to do a comparative study of the radius–luminosity (R− L) and X-ray− UV luminosity (LX …
to do a comparative study of the radius–luminosity (R− L) and X-ray− UV luminosity (LX …
Do quasar X-ray and UV flux measurements provide a useful test of cosmological models?
The recent compilation of quasar (QSO) X-ray and ultraviolet (UV) flux measurements
include QSOs that appear to not be standardizable via the X-ray luminosity and UV …
include QSOs that appear to not be standardizable via the X-ray luminosity and UV …
Gamma-ray burst data strongly favour the three-parameter fundamental plane (Dainotti) correlation over the two-parameter one
ABSTRACT Gamma-ray bursts (GRBs), observed to redshift z= 9.4, are potential probes of
the largely unexplored z∼ 2.7–9.4 part of the early Universe. Thus, finding relevant relations …
the largely unexplored z∼ 2.7–9.4 part of the early Universe. Thus, finding relevant relations …
Standardizing reverberation-measured C iv time-lag quasars, and using them with standardized Mg ii quasars to constrain cosmological parameters
We use 38 C iv quasar (QSO) reverberation-mapped observations, which span eight orders
of magnitude in luminosity and the redshift range 0.001064≤ z≤ 3.368, to simultaneously …
of magnitude in luminosity and the redshift range 0.001064≤ z≤ 3.368, to simultaneously …
Effect of extinction on quasar luminosity distances determined from UV and X-ray flux measurements
In Khadka et al., a sample of X-ray-detected reverberation-mapped quasars was presented
and applied for the comparison of cosmological constraints inferred using two well …
and applied for the comparison of cosmological constraints inferred using two well …