Constraining the Generalized and Superfluid Chaplygin Gas Models with the Sandage-Loeb Test  

作　　者：朱文涛 吴普训 余洪伟 

机构地区：[1]Center of Nonlinear Science and Department of Physics,Ningbo University

出　　处：《Chinese Physics Letters》2015年第5期174-177,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grants Nos 11175093,11222545,11435006,and 11375092;the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No 20124306110001;the K.C.Wong Magna Fund of Ningbo University

摘　　要：The Sandage Loeb （SL） test is a direct measurement of the cosmic expansion by probing the redshift drifts of quasi-stellar objects in the ＇redshift desert＇ of 2 〈 z 〈 5. In this work, we investigate its constraints on the unified dark energy and dark matter models including the generalized Chaplygin gas and the superfluid Chaplygin gas. In addition, type Ia supernovae （SNIa） data and the distance ratios derived from the cosmic microwave background radiation and baryon acoustic oscillation observations （CMB/BAO） are also used. We find that the mock SL data gives the tightest constraints on the model parameters and it can help to reduce the parameter regions allowed by the present SNIa＋CMB/BAO by about 75% when all datasets considered are combined. Thus the SL test is a worthy and long awaited measurement to probe effectively the cosmic expanding history and the properties of dark energy.The Sandage Loeb （SL） test is a direct measurement of the cosmic expansion by probing the redshift drifts of quasi-stellar objects in the ＇redshift desert＇ of 2 〈 z 〈 5. In this work, we investigate its constraints on the unified dark energy and dark matter models including the generalized Chaplygin gas and the superfluid Chaplygin gas. In addition, type Ia supernovae （SNIa） data and the distance ratios derived from the cosmic microwave background radiation and baryon acoustic oscillation observations （CMB/BAO） are also used. We find that the mock SL data gives the tightest constraints on the model parameters and it can help to reduce the parameter regions allowed by the present SNIa＋CMB/BAO by about 75% when all datasets considered are combined. Thus the SL test is a worthy and long awaited measurement to probe effectively the cosmic expanding history and the properties of dark energy.

关 键 词：CMB BA Constraining the Generalized and Superfluid Chaplygin Gas Models with the Sandage-Loeb Test 

分 类 号：P159[天文地球—天文学] V211.3[航空宇航科学与技术—航空宇航推进理论与工程]