Investigating the degeneracy between modified gravity and massive neutrinos with redshift-space distortions

doi:10.1088/1475-7516/2019/06/040

CORC > 国家天文台 > 中国科学院国家天文台

	Investigating the degeneracy between modified gravity and massive neutrinos with redshift-space distortions
	Wright, Bill S.1; Koyama, Kazuya 1; Winther, Hans A.1; Zhao, Gong-Bo 1,2,3
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2019-06-01
期号	6 页码:23
关键词	cosmological parameters from LSS modified gravity neutrino masses from cosmology cosmological simulations
ISSN号	1475-7516
DOI	10.1088/1475-7516/2019/06/040
英文摘要	There is a well known degeneracy between the enhancement of the growth of large-scale structure produced by modified gravity models and the suppression due to the free-streaming of massive neutrinos at late times. This makes the matter power-spectrum alone a poor probe to distinguish between modified gravity and the concordance Lambda CDM model when neutrino masses are not strongly constrained. In this work, we investigate the potential of using redshift-space distortions (RSD) to break this degeneracy when the modification to gravity is scale-dependent in the form of Hu-Sawicki f (R). We find that if the linear growth rate can be recovered from the RSD signal, the degeneracy can be broken at the level of the dark matter field. However, this requires accurate modelling of the non-linearities in the RSD signal, and we here present an extension of the standard perturbation theory based model for non-linear RSD that includes both Hu-Sawicki f (R) modified gravity and massive neutrinos.
资助项目	U.K. Science and Technology Facilities Council (STFC) research studentship ; European Research Council[646702] ; U.K. Science and Technologies Facilities Council[ST/N000668/1] ; NSFC[1171001024] ; NSFC[11673025] ; National Key Basic Research and Development Program of China[2018YFA0404503] ; ICG ; SEPNet ; University of Portsmouth
WOS关键词	N-BODY SIMULATIONS ; POWER SPECTRUM ; GALAXIES
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000472112200003
资助机构	U.K. Science and Technology Facilities Council (STFC) research studentship ; U.K. Science and Technology Facilities Council (STFC) research studentship ; European Research Council ; European Research Council ; U.K. Science and Technologies Facilities Council ; U.K. Science and Technologies Facilities Council ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; ICG ; ICG ; SEPNet ; SEPNet ; University of Portsmouth ; University of Portsmouth ; U.K. Science and Technology Facilities Council (STFC) research studentship ; U.K. Science and Technology Facilities Council (STFC) research studentship ; European Research Council ; European Research Council ; U.K. Science and Technologies Facilities Council ; U.K. Science and Technologies Facilities Council ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; ICG ; ICG ; SEPNet ; SEPNet ; University of Portsmouth ; University of Portsmouth ; U.K. Science and Technology Facilities Council (STFC) research studentship ; U.K. Science and Technology Facilities Council (STFC) research studentship ; European Research Council ; European Research Council ; U.K. Science and Technologies Facilities Council ; U.K. Science and Technologies Facilities Council ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; ICG ; ICG ; SEPNet ; SEPNet ; University of Portsmouth ; University of Portsmouth ; U.K. Science and Technology Facilities Council (STFC) research studentship ; U.K. Science and Technology Facilities Council (STFC) research studentship ; European Research Council ; European Research Council ; U.K. Science and Technologies Facilities Council ; U.K. Science and Technologies Facilities Council ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; ICG ; ICG ; SEPNet ; SEPNet ; University of Portsmouth ; University of Portsmouth
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/26568]
专题	中国科学院国家天文台
通讯作者	Wright, Bill S.
作者单位	1.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wright, Bill S.,Koyama, Kazuya,Winther, Hans A.,et al. Investigating the degeneracy between modified gravity and massive neutrinos with redshift-space distortions[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2019(6):23.
APA	Wright, Bill S.,Koyama, Kazuya,Winther, Hans A.,&Zhao, Gong-Bo.(2019).Investigating the degeneracy between modified gravity and massive neutrinos with redshift-space distortions.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(6),23.
MLA	Wright, Bill S.,et al."Investigating the degeneracy between modified gravity and massive neutrinos with redshift-space distortions".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .6(2019):23.