Generalized Brans-Dicke theories in light of evolving dark energy

doi:10.1103/PhysRevD.101.043518

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	Generalized Brans-Dicke theories in light of evolving dark energy
	Zucca, Alex 1; Pogosian, Levon 1,2; Silvestri, Alessandra 3; Wang, Yuting 4; Zhao, Gong-Bo 2,4,5
刊名	PHYSICAL REVIEW D
	2020-02-13
卷号	101 期号:4 页码:17
ISSN号	2470-0010
DOI	10.1103/PhysRevD.101.043518
英文摘要	The expansion history of the Universe reconstructed from a combination of recent data indicates a preference for a changing dark energy (DE) density. Moreover, the DE density appears to be increasing with cosmic time, with its equation of state being below -1 on average, and possibly crossing the so-called phantom divide. Scalar-tensor theories, in which the scalar field mediates a force between matter particles, offer a natural framework in which the effective DE equation of state can be less than -1 and cross the phantom barrier. We consider the generalized Brans-Dicke (GBD) class of scalar-tensor theories and reconstruct their Lagrangian given the effective DE density extracted from recent data. Then, given the reconstructed Lagrangian, we solve for the linear perturbations and investigate the characteristic signatures of these reconstructed GBD in the cosmological observables, such as the cosmic microwave background (CMB) anisotropy, the galaxy number counts, and their cross-correlations. In particular, we demonstrate that the integrated Sachs-Wolfe effect probed by the cross-correlation of CMB with the matter distribution can rule out scalar-tensor theories as the explanation of the observed DE dynamics independently from the laboratory and Solar System fifth force constraints.
资助项目	Natural Sciences and Engineering Research Council (NSERC) of Canada ; NWO ; Dutch Ministry of Education, Culture and Science (OCW) ; D-ITP consortium, a program of the NWO - OCW ; National Key Basic Research and Development Program of China[2018YFA0404503] ; NSFC[11720101004] ; NSFC[11673025] ; Nebula Talents Program of National Astronomy Observatories of China ; WestGrid ; Compute Canada
WOS关键词	BARYON ACOUSTIC-OSCILLATIONS ; SCALAR-TENSOR THEORY ; DR14 QUASAR SAMPLE ; PARAMETER CONSTRAINTS ; GRAVITY ; EQUATION ; GALAXIES ; UNIVERSE
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000513219500003
资助机构	Natural Sciences and Engineering Research Council (NSERC) of Canada ; Natural Sciences and Engineering Research Council (NSERC) of Canada ; NWO ; NWO ; Dutch Ministry of Education, Culture and Science (OCW) ; Dutch Ministry of Education, Culture and Science (OCW) ; D-ITP consortium, a program of the NWO - OCW ; D-ITP consortium, a program of the NWO - OCW ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; Nebula Talents Program of National Astronomy Observatories of China ; Nebula Talents Program of National Astronomy Observatories of China ; WestGrid ; WestGrid ; Compute Canada ; Compute Canada ; Natural Sciences and Engineering Research Council (NSERC) of Canada ; Natural Sciences and Engineering Research Council (NSERC) of Canada ; NWO ; NWO ; Dutch Ministry of Education, Culture and Science (OCW) ; Dutch Ministry of Education, Culture and Science (OCW) ; D-ITP consortium, a program of the NWO - OCW ; D-ITP consortium, a program of the NWO - OCW ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; Nebula Talents Program of National Astronomy Observatories of China ; Nebula Talents Program of National Astronomy Observatories of China ; WestGrid ; WestGrid ; Compute Canada ; Compute Canada ; Natural Sciences and Engineering Research Council (NSERC) of Canada ; Natural Sciences and Engineering Research Council (NSERC) of Canada ; NWO ; NWO ; Dutch Ministry of Education, Culture and Science (OCW) ; Dutch Ministry of Education, Culture and Science (OCW) ; D-ITP consortium, a program of the NWO - OCW ; D-ITP consortium, a program of the NWO - OCW ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; Nebula Talents Program of National Astronomy Observatories of China ; Nebula Talents Program of National Astronomy Observatories of China ; WestGrid ; WestGrid ; Compute Canada ; Compute Canada ; Natural Sciences and Engineering Research Council (NSERC) of Canada ; Natural Sciences and Engineering Research Council (NSERC) of Canada ; NWO ; NWO ; Dutch Ministry of Education, Culture and Science (OCW) ; Dutch Ministry of Education, Culture and Science (OCW) ; D-ITP consortium, a program of the NWO - OCW ; D-ITP consortium, a program of the NWO - OCW ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; Nebula Talents Program of National Astronomy Observatories of China ; Nebula Talents Program of National Astronomy Observatories of China ; WestGrid ; WestGrid ; Compute Canada ; Compute Canada
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/54258]
专题	中国科学院国家天文台
通讯作者	Zucca, Alex
作者单位	1.Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada 2.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 3.Leiden Univ, Inst Lorentz, POB 9506, NL-2300 RA Leiden, Netherlands 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 5.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zucca, Alex,Pogosian, Levon,Silvestri, Alessandra,et al. Generalized Brans-Dicke theories in light of evolving dark energy[J]. PHYSICAL REVIEW D,2020,101(4):17.
APA	Zucca, Alex,Pogosian, Levon,Silvestri, Alessandra,Wang, Yuting,&Zhao, Gong-Bo.(2020).Generalized Brans-Dicke theories in light of evolving dark energy.PHYSICAL REVIEW D,101(4),17.
MLA	Zucca, Alex,et al."Generalized Brans-Dicke theories in light of evolving dark energy".PHYSICAL REVIEW D 101.4(2020):17.