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Zhang, X; Huang, QG; Li, XD
Tight H-0 constraint from galaxy redshift surveys: combining baryon acoustic oscillation measurements and Alcock-Paczynski test with a CMB prior
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Language英语
KeywordDARK ENERGY SAMPLE EVOLUTION SPACE LIGHT
AbstractWe report a tight Hubble constant constraint 67.78(-1.86)(+1.21) km s(-1) Mpc(-1) (2.26 per cent precision) derived from galaxy redshift surveys. We combine the baryon acoustic oscillation (BAO) measurements from 6dFGS, the SDSS DR7 main galaxies, the BOSS DR12 galaxies, and eBOSS DR14 quasars, and also apply the tomographic Alcock-Paczynski (AP) method to the BOSS DR12 galaxies, to place constraints on H-0. Although the AP method alone cannot constrain H-0, it assists the BAO method by tightening the constraint on Omega(m) and breaks the degeneracy between the two parameters. Our result is fully consistent with the cosmic microwave background constraints from Planck, but in 2.58 sigma tension with local measurements. Compared with the BAO-alone constraint, the combined result reduces the error bar by 32 per cent, showing the strong power of the tomographic AP method in extracting cosmological information from galaxy surveys. In the analysis we adopt a prior of Omega(b) h(2) from the Planck experiment constraint and assume that the cosmology is the six-parameter flat lambda cold dark matter (Lambda CDM). We find that the first assumption has little effect on the derived constraints, i.e. the constraint is less affected as long as the Planck Omega(b) h(2) is not deviated from the true value by >4 sigma; the second assumption means that the results may alter in alternatives to Lambda CDM, where the H-0 constraints from different experiments can become more consistent.
2019
ISSN0035-8711
Volume483Issue:2Pages:1655-1662
Subject AreaAstronomy & Astrophysics
MOST Discipline CatalogueAstronomy & Astrophysics
DOI10.1093/mnras/sty3191
Indexed BySCIE
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/23494
CollectionSCI期刊论文
Affiliation1.[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, 19A Yuquan Rd, Beijing 100049, Peoples R China
4.Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China
5.Yangzhou Univ, Coll Phys Sci & Technol, Ctr Gravitat & Cosmol, Yangzhou 225009, Jiangsu, Peoples R China
6.Sun Yat Sen Univ, Sch Phys & Astron, Guangzhou 510297, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Zhang, X,Huang, QG,Li, XD. Tight H-0 constraint from galaxy redshift surveys: combining baryon acoustic oscillation measurements and Alcock-Paczynski test with a CMB prior[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,483(2):1655-1662.
APA Zhang, X,Huang, QG,&Li, XD.(2019).Tight H-0 constraint from galaxy redshift surveys: combining baryon acoustic oscillation measurements and Alcock-Paczynski test with a CMB prior.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,483(2),1655-1662.
MLA Zhang, X,et al."Tight H-0 constraint from galaxy redshift surveys: combining baryon acoustic oscillation measurements and Alcock-Paczynski test with a CMB prior".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 483.2(2019):1655-1662.
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