Searching for oscillations in the primordial power spectrum with CMB and LSS data

doi:10.1103/PhysRevD.99.043517

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	Searching for oscillations in the primordial power spectrum with CMB and LSS data
	Zeng, Chenxiao 2,4,6; Kovetz, Ely D.4; Chen, Xuelei 3,5,7; Gong, Yan 3; Munoz, Julian B.1; Kamionkowski, Marc 4
刊名	PHYSICAL REVIEW D
	2019-02-13
卷号	99 期号:4 页码:7
ISSN号	2470-0010
DOI	10.1103/PhysRevD.99.043517
英文摘要	Different inflationary models predict oscillatory features in the primordial power spectrum. These can leave an imprint on both the cosmic microwave background (CMB) and the large-scale structure (LSS) of our Universe that can be searched for with current data. Inspired by the axion-monodromy model of inflation, we search for primordial oscillations that are logarithmic in wave number, using both CMB data from the Planck satellite and LSS data from the WiggleZ galaxy survey. We find that, within our search range for the new oscillation parameters (amplitude, frequency and phase), both CMB-only and CMB thorn LSS data yield the same best-fit oscillation frequency of log(10) omega = 1.5, improving the fit over Delta CDM by Delta chi(2) = -9 and Delta chi(2) = -13 (roughly corresponding to 2 sigma and 2.8 sigma significance), respectively. Bayesian evidence for the log-oscillation model versus Delta CDM indicates a very slight preference for the latter. Future CMB and LSS data will further probe this scenario.
资助项目	NSF[0244990] ; NASA[NNX17AK38G] ; NSFC[11633004] ; NSFC[NSFC-11773031] ; NSFC[NSFC-11822305] ; CAS[QYZDJ-SSW-SLH017] ; Simons Foundation
WOS关键词	INFLATIONARY UNIVERSE ; EFFICIENT ; COSMOLOGY ; FLATNESS ; HORIZON
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000458819000002
资助机构	NSF ; NSF ; NASA ; NASA ; NSFC ; NSFC ; CAS ; CAS ; Simons Foundation ; Simons Foundation ; NSF ; NSF ; NASA ; NASA ; NSFC ; NSFC ; CAS ; CAS ; Simons Foundation ; Simons Foundation ; NSF ; NSF ; NASA ; NASA ; NSFC ; NSFC ; CAS ; CAS ; Simons Foundation ; Simons Foundation ; NSF ; NSF ; NASA ; NASA ; NSFC ; NSFC ; CAS ; CAS ; Simons Foundation ; Simons Foundation
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/25092]
专题	中国科学院国家天文台
通讯作者	Zeng, Chenxiao
作者单位	1.Harvard Univ, Dept Phys, Cambridge, MA 02138 USA 2.Ohio State Univ, Ctr Cosmol & Astroparticle Phys CCAPP, Columbus, OH 43210 USA 3.Chinese Acad Sci, Natl Astron Observatories, Key Lab Computat Astrophys, Beijing 100012, Peoples R China 4.Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA 5.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 6.Ohio State Univ, Dept Phys, Columbus, OH 43210 USA 7.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Chenxiao,Kovetz, Ely D.,Chen, Xuelei,et al. Searching for oscillations in the primordial power spectrum with CMB and LSS data[J]. PHYSICAL REVIEW D,2019,99(4):7.
APA	Zeng, Chenxiao,Kovetz, Ely D.,Chen, Xuelei,Gong, Yan,Munoz, Julian B.,&Kamionkowski, Marc.(2019).Searching for oscillations in the primordial power spectrum with CMB and LSS data.PHYSICAL REVIEW D,99(4),7.
MLA	Zeng, Chenxiao,et al."Searching for oscillations in the primordial power spectrum with CMB and LSS data".PHYSICAL REVIEW D 99.4(2019):7.