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Large Angular-scale Multipoles at Redshift similar to 0.8

文献类型：期刊论文

作者Tiwari, Prabhakar2; Aluri, Pavan K.1
刊名ASTROPHYSICAL JOURNAL
出版日期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
DOI10.3847/1538-4357/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.
WOS关键词RADIO LUMINOSITY FUNCTION ; LBDS-HERCULES SAMPLE ; DIPOLE ANISOTROPY ; 1.4 GHZ ; SKY ; ISOTROPY ; GALAXIES ; SPECTRUM ; VELOCITY
资助项目NSFC[1171001024] ; NSFC[11673025] ; National Key Basic Research and Development Program of China[2018YFA0404503] ; NAOC youth talent fund[110000JJ01]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000471246900005
出版者IOP PUBLISHING LTD
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
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.

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