Preliminary cosmological results using extreme accretors Quasar formalism

Abstract

We revisited the xA Quasar formalism from the cosmological point of view, where a completely cleaned and standardized sample is compiled from different literature references. This allowed us to test three different cosmological models including $w$CDM and $w_0{w}_a$CDM and $\Lambda$CDM resulting in a Hubble constant estimation of $H_0=69.8\pm 2.2$~$\mathrm{km}{\mathrm{s}}^{-1}\mathrm{Mp}{\mathrm{c}}^{-1}$ for the compiled sample alone and $H_0=69.0\pm 0.9$~$\mathrm{km}{\mathrm{s}}^{-1}\mathrm{Mp}{\mathrm{c}}^{-1}$ when combined with Type I Supernovae (SNIa), Cosmic Chronometers and the Cosmic Microwave Background (CMB) distance priors. Using both the $w$CDM and $w_0{w}_a$CDM a weak Bayesian preference for the dynamical dark energy models over the $\Lambda$CDM model was found. A comparative analysis was performed with other AGN based methods in cosmology like the Reverberation Mapping, the X-Ray and UV non-linear relation and the Angular distance measurements. We conclude that the significant intrinsic dispersion is a key issue present in all samples. Overcoming this dispersion is key to establish xA and other AGN samples as robust and precise cosmological probes.

arXiv commentAccepted for Publication on Physics of the Dark Universe to appear on June 2026

References in corpus (41)

• Accelerating Universes with Scaling Dark Matter
• 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
• In the Realm of the Hubble tension $-$ a Review of Solutions
• A 6% measurement of the Hubble parameter at $z\sim 0.45$: direct evidence of the epoch of cosmic re-acceleration
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Setting the Stage for Cosmic Chronometers. II. Impact of Stellar Population Synthesis Models Systematics and Full Covariance Matrix
• GetDist: a Python package for analysing Monte Carlo samples
• Constraints on the cosmic expansion history from GWTC-3
• CIV 1549 as an Eigenvector 1 Parameter for Active Galactic Nuclei
• TDCOSMO. I. An exploration of systematic uncertainties in the inference of $H_0$ from time-delay cosmography
• Distance Priors from Planck Final Release
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. IX 10 New Observations of Reverberation Mapping and Shortened H$\beta$ Lags
• Gemini GNIRS near-infrared spectroscopy of 50 quasars at z>~5.7
• Bolometric correction factors for Active Galactic Nuclei
• Quasars as standard candles III. Validation of a new sample for cosmological studies
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. V. A New Size-Luminosity Scaling Relation for the Broad-Line Region
• The Discovery of A Luminous Broad Absorption Line Quasar at A Redshift of 7.02
• Ultra-compact structure in intermediate-luminosity radio quasars: building a sample of standard cosmological rulers and improving the dark energy constraints up to $z\sim 3$
• An 8\% Determination of the Hubble Constant from localized Fast Radio Bursts
• Highly Accreting Quasars: Sample Definition and Possible Cosmological Implications
• TDCOSMO. XII. Improved Hubble constant measurement from lensing time delays using spatially resolved stellar kinematics of the lens galaxy
• Spectral Optical Monitoring of the Narrow Line Seyfert 1 galaxy Ark 564
• Highly accreting quasars: The SDSS low-redshift catalog
• High metal content of highly accreting quasars
• The Mira Distance to M101 and a 4% Measurement of H0
• Current and future applications of Reverberation-mapped quasars in Cosmology
• Extreme quasars at high redshift
• Binning is Sinning (Supernova Version): The Impact of Self-Calibration in Cosmological Analyses with Type Ia Supernovae
• Dark energy constraints from quasar observations
• Quasars and their emission lines as cosmological probes
• Extreme quasars as distance indicators in cosmology
• High-redshift quasars along the Main Sequence
• TDCOSMO. XVI. Measurement of the Hubble Constant from the Lensed Quasar WGD2038$-$4008
• The intermediate-ionization lines as virial broadening estimators for Population A quasars
• Quasars as standard candles VI: spectroscopic validation of the cosmological sample
• [OIII] emission in z=2 quasars with and without Broad Absorption Lines
• Are quasars reliable standard candles?
• The quasar main sequence and its potential for cosmology
• Spectral monitoring of AGNs: Preliminary results for Ark 564 and Arp 102B