Multiple measurements of quasars acting as standard probes: Model independent calibration and exploring the dark energy equation of states

作     者：XiaoGang Zheng Shuo Cao Marek Biesiada XiaoLei Li TongHua Liu YuTing Liu XiaoGang Zheng;Shuo Cao;Marek Biesiada;XiaoLei Li;TongHua Liu;YuTing Liu

作者机构：School of Eletrical and Electronic EngineeringWuhan Polytechnic UniversitWuhan 430023China Department of AstronomyBeiing Normnal UniversityBeijing 100875China National Centre for Nuclear ResearchWarsaw 02-093Poland College of PhysicsHebei Normal UniversiryShijiazhuang 050024China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2021年第64卷第5期

页      面：97-109页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12021003,11690023,11633001,and 11920101003) supported by the National Natural Science Foundation of China(Grant Nos.11947091,and 12003006) the National Key R&D Program of China(Grant No.2017YFA0402600) the Beijing Talents Fund of Organization Department of Beijing Municipal Committee of the CPC the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB23000000) the Opening Project of Key Laboratory of Computational Astrophysics,National Astronomical Observatories,Chinese Academy of Sciences the Interdiscipline Research Funds of Beijing Normal University supported by the Foreign Talent Introducing Project and Special Fund Support of Foreign Knowledge Introducing Project in China,the Key Foreign Expert Program for the Central Universities(Grant No.X2018002) the Natural Science Foundation of Hebei(Grant No.A202005002) 

主　　题：dark energy experiments dark energy theory quasars 

摘      要：Recently, two classes of quasar samples were identified, which are promising as new cosmological probes extending to higher redshifts. The first sample uses the nonlinear relation between the ultraviolet and X-ray luminosities of quasars to derive luminosity distances, whereas the linear sizes of compact radio quasars in the second sample can serve as standardized rulers, providing angular-diameter distances. In this study, under the assumption of a flat universe, we refreshed the calibration of multiple measurements of high-redshift quasars(in the framework of a cosmological-model-independent method with the newest Hubble parameters data). Furthermore, we placed constraints on four models that characterize the cosmic equation of state(w). The obtained results show that:(1) the two quasar samples could provide promising complementary probes at much higher redshifts,whereas compact radio quasars perform better than ultraviolet and X-ray quasars at the current observational level;(2) strong degeneracy between the cosmic equation of state(w) and Hubble constant(H0) is revealed, which highlights the importance of independent determination of H0 from time-delay measurements of strongly lensed quasars;(3) together with other standard ruler probes, such as baryon acoustic oscillation distance measurements, the combined QSO+BAO measurements are consistent with the standard ΛCDM model at a constant equation of state w =-1;(4) ranking the cosmological models, the polynomial parametrization gives a rather good fit among the four cosmic-equation-of-state models, whereas the Jassal-Bagla-Padmanabhan(JBP) parametrization is substantially penalized by the Akaike Information Criterion and Bayesian Information Criterion.