Measuring H-0 from low-z datasets

doi:10.1007/s11433-019-1504-8

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	Measuring H-0 from low-z datasets
	Zhang, Xue ; Huang, Qing-Guo
刊名	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2020
卷号	63 期号:9 页码:290402
关键词	BARYON ACOUSTIC-OSCILLATIONS CONSTRAINTS SAMPLE I.
ISSN号	1674-7348
DOI	10.1007/s11433-019-1504-8
英文摘要	The Hubble constant H-0 represents the expansion rate of the Universe at present and is closely related to the age of the Universe. The accurate measurement of Hubble constant is crucial for modern cosmology. However, different cosmological observations give diverse values of Hubble constant in literature. Up to now, there are two methods to measure the Hubble constant. One is to directly measure the Hubble constant based on distance ladder estimates of Cepheids and so on. The other is to globally fit the Hubble constant under the assumption of a cosmological model, for example the "standard" ACDM model. Adopting the low-redshift observational datasets, including the Pantheon sample of Type Ia supernovae, baryon acoustic oscillation measurements, and the tomographic Alcock-Paczynski method, we determine the Hubble constant to be 67.95-1.03+0.78, 69.81-2.70+2.22 and 66.75-4.23+3.42 km s(-1) Mpc(-1) at 68% confidence level in the ACDM, wCDM and w(0)w(a)CDM models, respectively. Compared to the Hubble constant given by Riess et al. in 2019, we conclude that the new physics beyond the standard ACDM model is needed if all of these datasets are reliable.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27023]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.[Zhang, Xue 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, Beijing 100049, Peoples R China 4.Yangzhou Univ, Coll Phys Sci & Technol, Ctr Gravitat & Cosmol, Yangzhou 225009, Jiangsu, Peoples R China 5.Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xue,Huang, Qing-Guo. Measuring H-0 from low-z datasets[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2020,63(9):290402.
APA	Zhang, Xue,&Huang, Qing-Guo.(2020).Measuring H-0 from low-z datasets.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,63(9),290402.
MLA	Zhang, Xue,et al."Measuring H-0 from low-z datasets".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 63.9(2020):290402.