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Zhang, Xue; Huang, Qing-Guo
Hubble constant and sound horizon from the late-time Universe
Source PublicationPHYSICAL REVIEW D
AbstractWe measure the expansion rate of the recent Universe and the calibration scale of the baryon acoustic oscillation (BAO) from low-redshift data. BAO relies on the calibration scale, i.e., the sound horizon at the end of drag epoch r(d), which often imposes a prior of the cosmic microwave background (CMB) measurement from the Planck satellite. In order to make really independent measurements of H-0, we leave r(d) completely free and use the BAO data sets combined with the 31 observational H(z) data, GW170817, and Pantheon sample of Type Ia supernovae. In lambda cold dark matter (Lambda CDM) model, we get H-0 = 68.63(-1.77)(+1.75) km s(-1) Mpc(-1), r(d) = 146.85(-3.77)(+3.29) Mpc. For the two model-independent reconstructions of H(z), we obtain H-0 = 68.02 +/- 1.82 km s(-1) Mpc(-1), r(d) = 148.18(-3.78)(+3.36) Mpc in the cubic expansion, and H-0 = 68.58 +/- 1.76 km s(-1) Mpc(-)1, r(d) = 148.02(-3.60)(+3.63) Mpc in the polynomial expansion. The values of Hubble constant H-0 and sound horizon r(d) are consistent with the estimate derived from the Planck CMB data assuming a flat Lambda CDM model, but H-0 is in 2.4 similar to 2.6 sigma tension with SH0ES 2019, respectively.
Cooperation Status国内
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
Indexed BySCIE
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Document Type期刊论文
Affiliation1.Yangzhou Univ, Coll Phys Sci & Technol, Ctr Gravitat & Cosmol, Yangzhou 225009, Jiangsu, Peoples R China
2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
4.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China
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GB/T 7714
Zhang, Xue,Huang, Qing-Guo. Hubble constant and sound horizon from the late-time Universe[J]. PHYSICAL REVIEW D,2021,103(4):43513.
APA Zhang, Xue,&Huang, Qing-Guo.(2021).Hubble constant and sound horizon from the late-time Universe.PHYSICAL REVIEW D,103(4),43513.
MLA Zhang, Xue,et al."Hubble constant and sound horizon from the late-time Universe".PHYSICAL REVIEW D 103.4(2021):43513.
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