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Recombination-independent Determination of the Sound Horizon and the Hubble Constant from BAO
Pogosian, Levon1; Zhao, Gong-Bo2,3; Jedamzik, Karsten4
2020-12-01
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
Volume904Issue:2Pages:6
AbstractThe Hubble tension and attempts to resolve it by modifying the physics of (or at) recombination motivate finding ways to determine H-0 and the sound horizon at the epoch of baryon decoupling r(d) in ways that rely neither on a recombination model nor on late-time Hubble data. In this work, we investigate what one can learn from the current and future BAO data when treating r(d) and H-0 as independent free parameters. It is well known that baryon acoustic oscillations (BAOs) give exquisite constraints on the product r(d)H(0). We show here that imposing a moderate prior on omega(m)h(2) breaks the degeneracy between r(d) and H-0. Using the latest BAO data, including the recently released the extended Baryon Oscillation Spectroscopic Survey Data Release 16, along with a omega(m)h(2) prior based on the Planck best-fit ? cold dark matter (?CDM) model, we find r(d) = 143.7 2.7 Mpc and H-0 = 69.6 1.8 km s(-1) Mpc(-1). BAO data prefers somewhat lower r(d) and higher H-0 than those inferred from Planck data in a ?CDM model. We find similar values when combing BAO with the Pantheon supernovae, the Dark Energy Survey Year 1 galaxy weak lensing, Planck or SPTPol cosmic microwave background lensing, and the cosmic chronometer data. We perform a forecast for the Dark Energy Spectroscopic Instrument (DESI) and find that, when aided with a moderate prior on omega(m)h(2), DESI will measure r(d) and H-0 without assuming a recombination model with an accuracy surpassing the current best estimates from Planck.
KeywordCosmology Baryon acoustic oscillations Hubble constant Recombination (cosmology)
Funding OrganizationWestGrid ; WestGrid ; Compute Canada Calcul Canada ; Compute Canada Calcul Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; Chinese Academy of Sciences President's International Fellowship Initiative ; Chinese Academy of Sciences President's International Fellowship Initiative ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; NSFC ; NSFC ; WestGrid ; WestGrid ; Compute Canada Calcul Canada ; Compute Canada Calcul Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; Chinese Academy of Sciences President's International Fellowship Initiative ; Chinese Academy of Sciences President's International Fellowship Initiative ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; NSFC ; NSFC ; WestGrid ; WestGrid ; Compute Canada Calcul Canada ; Compute Canada Calcul Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; Chinese Academy of Sciences President's International Fellowship Initiative ; Chinese Academy of Sciences President's International Fellowship Initiative ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; NSFC ; NSFC ; WestGrid ; WestGrid ; Compute Canada Calcul Canada ; Compute Canada Calcul Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; Chinese Academy of Sciences President's International Fellowship Initiative ; Chinese Academy of Sciences President's International Fellowship Initiative ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; NSFC ; NSFC
DOI10.3847/2041-8213/abc6a8
WOS KeywordBARYON ACOUSTIC-OSCILLATIONS ; CONSTRAINTS ; GALAXIES
Language英语
Funding ProjectWestGrid ; Compute Canada Calcul Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; Chinese Academy of Sciences President's International Fellowship Initiative[2020VMA0020] ; National Key Basic Research and Development Program of China[2018YFA0404503] ; CAS Interdisciplinary Innovation Team ; NSFC[11925303] ; NSFC[11720101004] ; NSFC[11673025] ; NSFC[11890691]
Funding OrganizationWestGrid ; WestGrid ; Compute Canada Calcul Canada ; Compute Canada Calcul Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; Chinese Academy of Sciences President's International Fellowship Initiative ; Chinese Academy of Sciences President's International Fellowship Initiative ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; NSFC ; NSFC ; WestGrid ; WestGrid ; Compute Canada Calcul Canada ; Compute Canada Calcul Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; Chinese Academy of Sciences President's International Fellowship Initiative ; Chinese Academy of Sciences President's International Fellowship Initiative ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; NSFC ; NSFC ; WestGrid ; WestGrid ; Compute Canada Calcul Canada ; Compute Canada Calcul Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; Chinese Academy of Sciences President's International Fellowship Initiative ; Chinese Academy of Sciences President's International Fellowship Initiative ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; NSFC ; NSFC ; WestGrid ; WestGrid ; Compute Canada Calcul Canada ; Compute Canada Calcul Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; National Sciences and Engineering Research Council (NSERC) of Canada ; Chinese Academy of Sciences President's International Fellowship Initiative ; Chinese Academy of Sciences President's International Fellowship Initiative ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; NSFC ; NSFC
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000592350800001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81156
Collection中国科学院国家天文台
Corresponding AuthorPogosian, Levon
Affiliation1.Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Montpellier, CNRS, UMR5299, Lab Univers & Particules Montpellier, F-34095 Montpellier, France
Recommended Citation
GB/T 7714
Pogosian, Levon,Zhao, Gong-Bo,Jedamzik, Karsten. Recombination-independent Determination of the Sound Horizon and the Hubble Constant from BAO[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,904(2):6.
APA Pogosian, Levon,Zhao, Gong-Bo,&Jedamzik, Karsten.(2020).Recombination-independent Determination of the Sound Horizon and the Hubble Constant from BAO.ASTROPHYSICAL JOURNAL LETTERS,904(2),6.
MLA Pogosian, Levon,et al."Recombination-independent Determination of the Sound Horizon and the Hubble Constant from BAO".ASTROPHYSICAL JOURNAL LETTERS 904.2(2020):6.
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