Constraints on Cosmological Models from Quasars Calibrated with Type Ia Supernova by a Gaussian Process

Abstract

In this paper, we use quasars calibrated from type Ia supernova (SN Ia) to constrain cosmological models. We consider three different X-ray luminosity ($L_X$) - ultraviolet luminosity ($L_{UV}$) relations of quasars, i.e., the standard $L_X$-$L_{UV}$ relation and two redshift-evolutionary relations (Type I and Type II) respectively constructed from copula and considering a redshift correction to the luminosity of quasars. Only in the case of the Type I relation, quasars can always provide effective constraints on the $\Lambda$CDM model. Furthermore, we show that, when the observational Hubble data (OHD) are added, the constraints on the absolute magnitude $M$ of SN Ia and the Hubble constant $H_0$ can be obtained. In the $\Lambda$CDM model, the OHD measurements plus quasars with the Type I relation yields $M$ =$-19.321_{-0.076}^{+0.085}$, which is in good agreement with the measurement from SH0ES ($M=-19.253\pm 0.027$), and $H_0$ = $70.80\pm 3.6\mathrm{km}{\mathrm{s}}^{-1}\mathrm{Mp}{\mathrm{c}}^{-1}$, falling between the measurements from SH0ES and the Planck cosmic microwave background radiation data.

9 pages,7 figures,4 tables. A new reference added. Published in MNRAS

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