8 papers
Redshift-Dependent Intrinsic Dispersion in the Quasar UV/X-ray Luminosity Relation
Jiaze Gao, Jianping Hu, Yun Chen +2
Accurate modeling of the intrinsic dispersion in the quasar UV/X-ray luminosity relation is essential for reliable cosmological inference. We investigate its redshift dependence us…
Deep Learning Calibration of the Quasar X-ray/UV Luminosity Relation for Cosmological Applications
Jiaze Gao, Yun Chen, Lixin Xu +2
Quasars can serve as standard candles through an empirical scaling relation between their ultraviolet (UV) and X-ray luminosities. As high-redshift probes, it is critical to test w…
New Dynamical Measurements from a Lensed Quasar Sample: Joint Analysis Constrains the Mass Profile Evolution of Lens Galaxies
Ziyu Guo, Yun Chen, Yiping Shu +4
We present a systematic study of the internal mass structure of early-type galaxies (ETGs) based on 106 galaxy-scale strong gravitational lenses with background quasars, all having…
Redshift Evolution of the HII Galaxy - Relation: Gaussian Process Analysis and Cosmological Implications
Jiaze Gao, Yun Chen, Lixin Xu
The empirical correlation between the H luminosity () and the ionized gas velocity dispersion () in HII starburst galaxies (HIIGs) provides a foundation for using them a…
Constraints on transition redshift utilizing the latest H(z) measurements and comments on the Hubble tension
Jianping Hu, Xuandong Jia, DaoHong Gao +3
The motivation of this paper is to obtain reliable constraints of transition redshift () and, in combination with the evolution of the Hubble constant () that could…
Detection of gamma-ray burst Amati relation based on Hubble data set and Pantheon+ samples
Yufen Han, Jiaze Gao, Gang Liu +1
Using gamma-ray bursts as standard candles for cosmological parameter constraints rely on their empirical luminosity relations and low-redshift calibration. In this paper, we exami…