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Cosmological test of an extended quintessence model
Cheng, Gong1,2; Wu, Fengquan1; Chen, Xuelei1,2,3,4
2021-05-19
Source PublicationPHYSICAL REVIEW D
ISSN2470-0010
Volume103Issue:10Pages:12
AbstractWe investigate the cosmological observational test of the extended quintessence model, i.e., a scalar-tensor gravity model with a scalar field potential serving as dark energy, by using the Planck 2018 cosmic microwave background (CMB) data, together with the baryon acoustic oscillations (BAO) and redshiftspace distortion (RSD) data. As an example, we consider the model with a Brans-Dicke kinetic term omega(phi)/phi phi(;mu)phi(;mu) and a quadratic scalar potential V(phi) = A + B(phi-phi(0)) + C/2(phi-phi(0))(2). which reduces to general relativity (GR) in the limit omega(phi) -> infinity the cosmological constant in the limit B = C = 0. In such a model, the scalar field typically rolls down the potential and oscillates around the minimum of V(phi). We find that the model parameter estimate for the CMB thorn BAO thorn RSD data set is given by lg alpha = -3.6(-0.54)(+0.66) (68%) [alpha is defined in Eq. (3)], corresponding to 3.8 x 10(5) < omega(0) < 9.5 x 10(7) (68%) and lg C = 4.9 +/- 1.4 (68%). However, the GR Lambda CDM model can fit the data almost as good as this extended quintessence model and is favored by the Akaike information criterion. The variation of the gravitational constant since the epoch of Recombination is constrained to be 0.97 < G(rec)/G(0) < 1.03(1 sigma). In light of a recent report that the CMB data favor a closed universe, we consider the case with nonflat geometry in our fit and find that the mean value of Omega(k) shifts a little bit from -0.049 to -0.036, and the parameters in our model are not degenerate with Omega(k).
Funding OrganizationMinistry of Science and Technology ; Ministry of Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science ; Ministry of Science and Technology ; Ministry of Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science ; Ministry of Science and Technology ; Ministry of Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science ; Ministry of Science and Technology ; Ministry of Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science
DOI10.1103/PhysRevD.103.103527
WOS KeywordREDSHIFT-SPACE DISTORTIONS ; BARYON ACOUSTIC-OSCILLATIONS ; MAIN GALAXY SAMPLE ; DARK ENERGY ; GROWTH-RATE ; GRAVITY ; ANISOTROPIES ; DISTANCE ; MATTER
Language英语
Funding ProjectMinistry of Science and Technology[2018YFE0120800] ; National Natural Science Foundation of China[11633004] ; National Natural Science Foundation of China[11473044] ; National Natural Science Foundation of China[11773031] ; National Natural Science Foundation of China[11973047] ; Chinese Academy of Science[QYZDJ-SSW-SLH017] ; Chinese Academy of Science[XDB 23040100] ; Chinese Academy of Science[XDA15020200]
Funding OrganizationMinistry of Science and Technology ; Ministry of Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science ; Ministry of Science and Technology ; Ministry of Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science ; Ministry of Science and Technology ; Ministry of Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science ; Ministry of Science and Technology ; Ministry of Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000655903100003
PublisherAMER PHYSICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/77082
Collection中国科学院国家天文台
Corresponding AuthorCheng, Gong
Affiliation1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
3.Northeastern Univ, Coll Sci, Dept Phys, Shenyang 110819, Peoples R China
4.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Cheng, Gong,Wu, Fengquan,Chen, Xuelei. Cosmological test of an extended quintessence model[J]. PHYSICAL REVIEW D,2021,103(10):12.
APA Cheng, Gong,Wu, Fengquan,&Chen, Xuelei.(2021).Cosmological test of an extended quintessence model.PHYSICAL REVIEW D,103(10),12.
MLA Cheng, Gong,et al."Cosmological test of an extended quintessence model".PHYSICAL REVIEW D 103.10(2021):12.
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