Large Angular-scale Multipoles at Redshift similar to 0.8

doi:10.3847/1538-4357/ab1d58

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	Large Angular-scale Multipoles at Redshift similar to 0.8
	Tiwari, Prabhakar 2; Aluri, Pavan K.1
刊名	ASTROPHYSICAL JOURNAL
	2019-06-10
卷号	878 期号:1 页码:8
关键词	dark matter galaxies: active galaxies: high-redshift large-scale structure of universe
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab1d58
英文摘要	We prepare the full sky radio galaxy map (vertical bar b vertical bar > 10 degrees), using the north NRAO VLA Sky Survey and south Sydney University Molonglo Sky Survey galaxy catalogs, and study the large-scale multipole anomalies. These galaxies are roughly at redshift z similar to 0.8 and are therefore tracing the matter distribution at very large scales. The quadruple and octopole from the radio galaxy catalog are consistent with ACDM for a reasonable value of galaxy bias and we do not find dipole-quadruple-octopole alignment as seen in cosmic microwave background (CMB) temperature maps. The quadrupole direction is roughly 46 degrees away from dipole, and the octopole direction is approximately 33 degrees from dipole. The angle between quadrupole and octopole is around 70 degrees. We have large errors in multipole directions due to shot noise. However, with the data that is currently available we do not find any significant alignment between the l = 1, 2, 3 modes. The magnitude of all multipoles, except dipole, are roughly consistent with ACDM for reasonable galaxy bias. The dipole magnitude remains inconsistent with CMB as reported in previous studies. Our findings may impose stringent constraints on cosmological models with large-scale anisotropy features.
资助项目	NSFC[1171001024] ; NSFC[11673025] ; National Key Basic Research and Development Program of China[2018YFA0404503] ; NAOC youth talent fund[110000JJ01]
WOS关键词	RADIO LUMINOSITY FUNCTION ; LBDS-HERCULES SAMPLE ; DIPOLE ANISOTROPY ; 1.4 GHZ ; SKY ; ISOTROPY ; GALAXIES ; SPECTRUM ; VELOCITY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000471246900005
资助机构	NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NAOC youth talent fund ; NAOC youth talent fund ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NAOC youth talent fund ; NAOC youth talent fund ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NAOC youth talent fund ; NAOC youth talent fund ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NAOC youth talent fund ; NAOC youth talent fund
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/26559]
专题	中国科学院国家天文台
通讯作者	Tiwari, Prabhakar
作者单位	1.Indian Inst Technol BHU, Dept Phys, Varanasi 221005, Uttar Pradesh, India 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Tiwari, Prabhakar,Aluri, Pavan K.. Large Angular-scale Multipoles at Redshift similar to 0.8[J]. ASTROPHYSICAL JOURNAL,2019,878(1):8.
APA	Tiwari, Prabhakar,&Aluri, Pavan K..(2019).Large Angular-scale Multipoles at Redshift similar to 0.8.ASTROPHYSICAL JOURNAL,878(1),8.
MLA	Tiwari, Prabhakar,et al."Large Angular-scale Multipoles at Redshift similar to 0.8".ASTROPHYSICAL JOURNAL 878.1(2019):8.