ITP OpenIR  > 理论物理所2014年知识产出
Searching for a preferred direction with Union2.1 data
Yang, XF; Wang, FY; Chu, Z; Wang, FY (reprint author), Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China.
2014
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
卷号437期号:2页码:1840-1846
摘要A cosmological preferred direction was reported from the Type Ia supernovae data in recent years. We use the Union2.1 data to give a simple classification of such studies for the first time. Because the maximum anisotropic direction is independent of isotropic dark energy models, we adopt two cosmological models (Lambda CDM, wCDM) for the hemisphere comparison analysis and the Lambda cold dark matter (Lambda CDM) model for a dipole-fitting approach. In hemisphere comparison method, the matter density and the equation of state of dark energy are adopted as the diagnostic qualities in the Lambda CDM model and the wCDM model, respectively. In the dipole-fitting approach, we fit the fluctuation of distance modulus. We find that there is a null signal for the hemisphere comparison method, while a preferred direction (b = -14 degrees.3 +/- 10 degrees.1, l = 307.1 degrees +/- 16.2 degrees) for the dipole-fitting method. This result indicates that the dipole fit is more sensitive than the hemisphere comparison method.
部门归属[Yang, Xiaofeng; Wang, F. Y.] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China; [Yang, Xiaofeng; Wang, F. Y.] Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China; [Yang, Xiaofeng] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China; [Chu, Zhe] Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
关键词Gamma-ray Bursts Dark-energy Supernova Data Constraints Dependence Anisotropy Universe
学科领域Physics
资助者State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences; National Basic Research Program of China (973 Program) [2014CB845800]; National Natural Science Foundation of China [11373022, 11103007, 11033002] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences; National Basic Research Program of China (973 Program) [2014CB845800]; National Natural Science Foundation of China [11373022, 11103007, 11033002] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences; National Basic Research Program of China (973 Program) [2014CB845800]; National Natural Science Foundation of China [11373022, 11103007, 11033002] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences; National Basic Research Program of China (973 Program) [2014CB845800]; National Natural Science Foundation of China [11373022, 11103007, 11033002]
DOI10.1093/mnras/stt2015
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收录类别SCI
语种英语
资助者State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences; National Basic Research Program of China (973 Program) [2014CB845800]; National Natural Science Foundation of China [11373022, 11103007, 11033002] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences; National Basic Research Program of China (973 Program) [2014CB845800]; National Natural Science Foundation of China [11373022, 11103007, 11033002] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences; National Basic Research Program of China (973 Program) [2014CB845800]; National Natural Science Foundation of China [11373022, 11103007, 11033002] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences; National Basic Research Program of China (973 Program) [2014CB845800]; National Natural Science Foundation of China [11373022, 11103007, 11033002]
WOS记录号WOS:000331617000061
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被引频次:26[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15517
专题理论物理所2014年知识产出
通讯作者Wang, FY (reprint author), Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China.
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Yang, XF,Wang, FY,Chu, Z,et al. Searching for a preferred direction with Union2.1 data[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,437(2):1840-1846.
APA Yang, XF,Wang, FY,Chu, Z,&Wang, FY .(2014).Searching for a preferred direction with Union2.1 data.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,437(2),1840-1846.
MLA Yang, XF,et al."Searching for a preferred direction with Union2.1 data".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 437.2(2014):1840-1846.
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