The cluster-galaxy cross-correlation and the average infall velocity around cluster in the modified CDM models  

作　　者：林文斌 褚耀泉 

出　　处：《Science China Mathematics》1998年第10期1092-1099,共8页中国科学：数学（英文版）

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina (GrantNo .197330 0 1) .

摘　　要：The cluster-galaxy cross-correlation and the average infall velocity around cluster for the tilted CDM models, the hot-cold mixed dark matter models (MDM) and theA CDM models are calculated. And it is found that the prediction of the cluster-galaxy cross-correlation of theA CDM models with ΩA=0.9, ΩC=0.1,h=1,b = 1 or 2 is much higher than that of observation for the radius larger than 10 h?1 Mpc (H0 = 100 h.kms?1Mpc?1), and the other models are compatible with the observation on the scale of (3–20) h? Mpc. The results can be used to compare with new observations to restrict the nature of the dark matter and the biasing factor.The cluster_galaxy cross_correlation and the average infal l velocity around cluster for the tilted CDM models, the hot_cold mixed dark matte r model s (MDM) and the ΛCDM models are calculated. And it is found that the predic tion of the cluster_galaxy cross_correlation of the ΛCDM models with Ω Λ=0.9, Ω C=0.1, h=1, b=1 or 2 is much higher than that of obser vation for the radius larger than 10 h -1 Mpc (H 0=100 h·kms -1 M pc -1 ), and the other models are compatible with the observation on the scale of (3-2 0) h -1 Mpc. The results can be used to compare with new observations to restrict the nature of the dark matter and the biasing factor.

关 键 词：DARK matter the large-scale structure cross_correlation AVERAGE INFALL velocity. 

分 类 号：P142[天文地球—天体物理]