Using the Mark Weighted Correlation Functions to Improve the Constraints on Cosmological Parameters
Yang,Yizhao1; Miao,Haitao1,2; Ma,Qinglin1; Liu,Miaoxin1; Sabiu,Cristiano G.3; Forero-Romero,Jaime4; Huang,Yuanzhu1; Lai,Limin1; Qian,Qiyue1; Zheng,Yi1; Li,Xiao-Dong1
Source PublicationThe Astrophysical Journal
AbstractAbstract We used the mark weighted correlation functions (MCFs), W(s), to study the large-scale structure of the universe. We studied five types of MCFs with the weighting scheme ρα, where ρ is the local density, and α is taken as ?1,??0.5, 0, 0.5, and 1. We found that different MCFs have very different amplitudes and scale dependence. Some of the MCFs exhibit distinctive peaks and valleys that do not exist in the standard correlation functions. Their locations are robust against the redshifts and the background geometry; however, it is unlikely that they can be used as “standard rulers” to probe the cosmic expansion history. Nonetheless, we find that these features may be used to probe parameters related with the structure formation history, such as the values of σ8 and the galaxy bias. Finally, after conducting a comprehensive analysis using the full shapes of the W(s)s and WΔs(μ)s, we found that combining different types of MCFs can significantly improve the cosmological parameter constraints. Compared with using only the standard correlation function, the combinations of MCFs with α?=?0, 0.5, 1 and α?=?0,??1,??0.5, 0.5, 1 can improve the constraints on Ωm and w by ≈30% and 50%, respectively. We find highly significant evidence that MCFs can improve cosmological parameter constraints.
KeywordLarge-scale structure of the universe Cosmological parameters from large-scale structure
WOS IDIOP:0004-637X-900-1-aba35b
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.School of Physics and Astronomy, Sun Yat-Sen University, Guangzhou 510297, People's Republic of China
2.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
3.Department of Astronomy, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
4.Departamento de Física, Universidad de los Andes, Cra. 1 No. 18A-10 Edificio Ip, CP 111711, Bogotá, Colombia
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GB/T 7714
Yang,Yizhao,Miao,Haitao,Ma,Qinglin,et al. Using the Mark Weighted Correlation Functions to Improve the Constraints on Cosmological Parameters[J]. The Astrophysical Journal,2020,900(1).
APA Yang,Yizhao.,Miao,Haitao.,Ma,Qinglin.,Liu,Miaoxin.,Sabiu,Cristiano G..,...&Li,Xiao-Dong.(2020).Using the Mark Weighted Correlation Functions to Improve the Constraints on Cosmological Parameters.The Astrophysical Journal,900(1).
MLA Yang,Yizhao,et al."Using the Mark Weighted Correlation Functions to Improve the Constraints on Cosmological Parameters".The Astrophysical Journal 900.1(2020).
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