Redshift-Dependent Intrinsic Dispersion in the Quasar UV/X-ray Luminosity Relation

arXiv:2606.27173 · astro-ph.CO · Submitted 2026-06-25 · Read on arXiv

Jiaze Gao, Jianping Hu, Yun Chen, Bowen Zhao, Lixin Xu

astro-ph.CO

Submitted: 2026-06-25

Comments: 11 pages, 4 figures, 2 tables

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Robustness — 6× in this paper · explained in 5 episodes
• Calibration — 3× in this paper · explained in 7 episodes
• Bayesian Inference — 2× in this paper · explained in 5 episodes
• Systematic Bias — 2× in this paper · explained in 3 episodes
• AGN — 1× in this paper · explained in 1 episode
• Benchmark — 1× in this paper · explained in 2 episodes
• Observational Selection Effects — 1× in this paper · explained in 2 episodes

Sources

• A luminous quasar at a redshift of z = 7.085
• Cosmology with AGN: can we use quasars as standard candles?
• An 800-million-solar-mass black hole in a significantly neutral Universe at redshift 7.5
• Quasars as standard candles III. Validation of a new sample for cosmological studies
• Measurements of the Hubble Constant: Tensions in Perspective
• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• A Luminous Quasar at Redshift 7.642
• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• The Pantheon+ Analysis: Cosmological Constraints
• Evidence for heavy seed origin of early supermassive black holes from a z~10 X-ray quasar
• A Review of Line and Continuum Correlations in AGNs
• Quasar Parallax: a Method for Determining Direct Geometrical Distances to Quasars
• A new cosmological distance measure using AGN
• Super-Eddington accreting massive black holes as long-lived cosmological standards
• Quasars and their emission lines as cosmological probes
• A new cosmological distance measure using AGN X-ray variability
• On the Scatter in the Radius - Luminosity Relationship for Active Galactic Nuclei
• A Hubble Diagram for Quasars
• The tight relation between X-ray and ultraviolet luminosity of quasars
• Quasar standardization: Overcoming Selection Biases and Redshift Evolution

Related papers

• Angular clustering and bias of photometric quasars in the Kilo-Degree Survey Data Release 4
• A Novel kinetic Sunyaev-Zel'dovich Estimator for Electron-Electron Correlations
• Magnetic fields at the dawn of structure formation I. The CARLA J1510+5958 proto-cluster
• Dark Energy Survey Year 6 Results: Weak Lensing and Galaxy Clustering Cosmological Analysis Framework
• Exploring the Impact of Systematic Bias in Type Ia Supernova Cosmology Across Diverse Dark Energy Parametrizations
• Non-Gaussian Galaxy Stochasticity and the Noise-Field Formulation