Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius-luminosity relation luminosity distances

Khadka, Narayan; Prince, Raj; Panda, Swayamtrupta; Martínez-Aldama, Mary Loli; Jaiswal, Vikram Kumar; Ratra, Bharat

doi:10.48550/arxiv.2212.10483

Cited by 2 publications

(2 citation statements)

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“…In our analyses here we also exclude RM Hβ QSO data that probe to z ∼ 0.9, [22,23,44], because the resulting cosmological parameter constraints are in ∼ 2σ tension with those from more established probes. QSO flux observations that reach to z ∼ 7.5 have been studied, [45][46][47][48][49][50][51][52][53][54][55], however, we also exclude these QSOs from our analyses here since the latest QSO flux compilation, [50], is not standardizable, [51,52,56,57].…”

Section: Introductionmentioning

confidence: 99%

$H_0=69.8\pm1.3$ $\rm{km \ s^{-1} \ Mpc^{-1}}$, $Ω_{m0}=0.288\pm0.017$, and other constraints from lower-redshift, non-CMB and non-distance-ladder, expansion-rate data

Cao¹,

Ratra²

2023

Preprint

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We use updated Type Ia Pantheon+ supernova, baryon acoustic oscillation, and Hubble parameter (now also accounting for correlations) data, as well as new reverberation-measured C iv quasar data, and quasar angular size, H ii starburst galaxy, reverberation-measured Mg ii quasar, and Amaticorrelated gamma-ray burst data to constrain cosmological parameters. We show that these data sets result in mutually consistent constraints and jointly use them to constrain cosmological parameters in six different spatially-flat and non-flat cosmological models. Our analysis provides summary modelindependent determinations of two key cosmological parameters: the Hubble constant, H0 = 69.8 ± 1.3 km s −1 Mpc −1 , and the current non-relativistic matter density parameter, Ωm0 = 0.288 ± 0.017. Our summary error bars are 2.4 and 2.3 times those obtained using the flat ΛCDM model and Planck TT,TE,EE+lowE+lensing cosmic microwave background (CMB) anisotropy data. Our H0 value is very consistent with that from the local expansion rate based on the Tip of the Red Giant Branch data, is 2σ lower than that from the local expansion rate based on Type Ia supernova and Cepheid data, and is 2σ higher than that in the flat ΛCDM model based on Planck TT,TE,EE+lowE+lensing CMB data. Our data compilation shows at most mild evidence for non-flat spatial hypersurfaces, but more significant evidence for dark energy dynamics, 2σ or larger in the spatially-flat dynamical dark energy models we study.

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Section: Introductionmentioning

confidence: 99%

$H_0=69.8\pm1.3$ $\rm{km \ s^{-1} \ Mpc^{-1}}$, $Ω_{m0}=0.288\pm0.017$, and other constraints from lower-redshift, non-CMB and non-distance-ladder, expansion-rate data

Cao¹,

Ratra²

2023

Preprint

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“…It should be pointed out that controversies have arisen regarding this deviation(Yang et al 2020;Banerjee et al 2021;Bargiacchi et al 2021; Khadka & Ratra 2022;Sacchi et al 2022;Khadka et al 2022;Dainotti et al 2022;Lenart et al 2023;Wang et al 2022;Mehrabi & Basilakos 2020;Velten & Gomes 2020;Petrosian et al 2022). Some researches indicated that this deviation may originate from the divergence of the logarithmic polynomial expansion at the high-redshift regions(Yang et al 2020;Banerjee et al 2021).…”

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confidence: 99%

Redshift-evolutionary X-Ray and UV Luminosity Relation of Quasars from Gaussian Copula

Wang

Liu

Yuan

et al. 2022

ApJ

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We construct a three-dimensional and redshift-evolutionary X-ray and ultraviolet (L X –L UV ) luminosity relation for quasars from the powerful statistic tool called copula, and find that the constructed L X –L UV relation from copula is more viable than the standard one and the observations favor the redshift-evolutionary relation more than 3σ. The Akaike and Bayes information criterions indicate that the quasar data support strongly the three-dimensional L X –L UV relation. Our results show that the quasars can be regarded as a reliable indicator of the cosmic distance if the L X –L UV relation from copula is used to calibrate quasar data.

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Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius-luminosity relation luminosity distances

Cited by 2 publications

References 0 publications

$H_0=69.8\pm1.3$ $\rm{km \ s^{-1} \ Mpc^{-1}}$, $Ω_{m0}=0.288\pm0.017$, and other constraints from lower-redshift, non-CMB and non-distance-ladder, expansion-rate data

$H_0=69.8\pm1.3$ $\rm{km \ s^{-1} \ Mpc^{-1}}$, $Ω_{m0}=0.288\pm0.017$, and other constraints from lower-redshift, non-CMB and non-distance-ladder, expansion-rate data

Redshift-evolutionary X-Ray and UV Luminosity Relation of Quasars from Gaussian Copula

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