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	Redshift drift constraints on f(T) gravity
	Geng Jiajia; Guo Ruiyun; He Dongze; Zhang Jingfei; Zhang Xin
来源期刊	Frontiers of Physics
ISSN	2095-0462
出版年	2015
卷号	10 期号:5 页码:109501-
英文摘要	We explore the impact of the Sandage-Loeb (SL) test on the precision of cosmological constraints for f(T) gravity theories. The SL test is an important supplement to current cosmological observations because it measures the redshift drift in the Lyman-a forest in the spectra of distant quasars, covering the "redshift desert" of 2 ? z ? 5. To avoid data inconsistency, we use the best-fit models based on current combined observational data as fiducial models to simulate 30 mock SL test data. We quantify the impact of these SL test data on parameter estimation for f(T) gravity theories. Two typical f(T) models are considered, the power-law model f(T)_(PL) and the exponential-form model f(T)_(EXP). The results show that the SL test can effectively break the existing strong degeneracy between the present-day matter density Omega_m and the Hubble constant H_0 in other cosmological observations. For the considered f(T) models, a 30-year observation of the SL test can improve the constraint precision of Omega_m and H_0 enormously but cannot effectively improve the constraint precision of the model parameters.
英文关键词	redshift drift cosmological constraints dark energy modified gravity f(T) gravity
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Physics
CSCD记录号	CSCD:5595503
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335577
作者单位	Geng Jiajia, Department of Physics, College of Sciences, Northeastern University, Shenyang, Liaoning 110004, China.; Guo Ruiyun, Department of Physics, College of Sciences, Northeastern University, Shenyang, Liaoning 110004, China.; He Dongze, Department of Physics, College of Sciences, Northeastern University, Shenyang, Liaoning 110004, China.; Zhang Jingfei, Department of Physics, College of Sciences, Northeastern University, Shenyang, Liaoning 110004, China.; Zhang Xin, Department of Physics, College of Sciences, Northeastern University, Shenyang, Liaoning 110004, China.
推荐引用方式 GB/T 7714	Geng Jiajia,Guo Ruiyun,He Dongze,et al. Redshift drift constraints on f(T) gravity[J],2015,10(5):109501-.
APA	Geng Jiajia,Guo Ruiyun,He Dongze,Zhang Jingfei,&Zhang Xin.(2015).Redshift drift constraints on f(T) gravity.Frontiers of Physics,10(5),109501-.
MLA	Geng Jiajia,et al."Redshift drift constraints on f(T) gravity".Frontiers of Physics 10.5(2015):109501-.