紅移z~1的Lyman Break星系兩點(diǎn)相關(guān)函數(shù)
發(fā)布時(shí)間:2018-05-26 02:14
本文選題:大尺度結(jié)構(gòu) + 宇宙學(xué)距離; 參考:《上海師范大學(xué)》2013年碩士論文
【摘要】:兩點(diǎn)相關(guān)函數(shù)是研究星系大尺度分布的一種重要工具。本文所使用的數(shù)據(jù)是由陳竹等(2013)[35]根據(jù)Burgarella等(2007)[36]篩選出的LBG(Lyman breakgalaxy)候選星系樣本中,紅移z~1的LBG候選星系。樣本星系在NUV波段上,AB視星等亮于24.2等的完備率約為83%,極限星等為26.2等;我們根據(jù)樣本擬合出其Schechter光度函數(shù),然后根據(jù)光度函數(shù)對(duì)樣本星系進(jìn)行加權(quán),以改正其Malmquist偏差;最后根據(jù)其權(quán)重計(jì)算樣本星系紅移空間內(nèi)的兩點(diǎn)相關(guān)函數(shù)?紤]其邊界效應(yīng)后,在小尺度上進(jìn)行冪律譜擬合,在Ω_L=0.7,Ω_m=0.3的平坦ΛCDM宇宙學(xué)模型下,得到兩點(diǎn)相關(guān)函數(shù)的指數(shù)γ為-1.83+0.09;-0.09,,相關(guān)長(zhǎng)度r_0為5.31+1.61;-1.67h^(-1)Mpc。
[Abstract]:The two-point correlation function is an important tool for studying the large-scale distribution of galaxies. The data used in this paper are the LBG(Lyman breakGalaxy Y candidate galaxies selected by Chen Zhu et al. 2013) [35] according to Burgarella et al. 2007) [36]. On the NUV band, the complete ratio of the sample galaxies is about 83 and the limit magnitude is 26.2.We fit its Schechter photometric function according to the sample, and then weighted the sample galaxies according to the photometric function to correct their Malmquist deviation. Finally, the two-point correlation function in the redshift space of the sample galaxy is calculated according to its weight. After considering the boundary effect, the power law spectrum fitting is carried out on a small scale. Under the flat CDM cosmological model of 惟 _ S _ L _ (0.7) and 惟 _ S _ m _ (0), the exponent 緯 of the two-point correlation function is -1.83 0.09 ~ 0.09 and the correlation length r _ S _ 0 is 5.31 1.61 ~ 1.67 h ~ (-1) Mpc.
【學(xué)位授予單位】:上海師范大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2013
【分類號(hào)】:P15
【共引文獻(xiàn)】
相關(guān)期刊論文 前1條
1 Li-Ping Fu;Zu-Hui Fan;;Probing the dark side of the Universe with weak gravitational lensing effects[J];Research in Astronomy and Astrophysics;2014年09期
相關(guān)碩士學(xué)位論文 前2條
1 曾彬;CFHTLS深度巡天PSF修正改進(jìn)[D];上海師范大學(xué);2013年
2 王魁東;VST數(shù)據(jù)的PSF修正改進(jìn)[D];上海師范大學(xué);2014年
本文編號(hào):1935551
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