典型文献
Constraining Brans-Dicke Cosmology with the CSST Galaxy Clustering Spectroscopic Survey
文献摘要：
The Brans-Dicke(BD)theory is the simplest Scalar-Tensor theory of gravity,which can be considered as a candidate of modified Einstein's theory of general relativity.In this work,we forecast the constraints on BD theory in the CSST galaxy clustering spectroscopic survey with a magnitude limit～23 AB mag for point-source 5σdetection.We generate mock data based on the zCOSMOS catalog and consider the observational and instrumental effects of the CSST spectroscopic survey.We predict galaxy power spectra in the BD theory from z = 0 to 1.5,and the galaxy bias and other systematical parameters are also included.The Markov Chain Monte Carlo technique is employed to find the best-fits and probability distributions of the cosmological and systematical parameters.A BD parameter ζ is introduced,which satisfies ζ = ln(1+1/ω).We find that the CSST spectroscopic galaxy clustering survey can give lζl＜10-2,or equivalently |ω|＞O(102)and |G/G|＜10-13,under the assumption ζ = 0.These constraints are almost at the same order of magnitude compared to the joint constraints using the current cosmic microwave background,baryon acoustic oscillations and Type Ia supernova data,indicating that the CSST galaxy clustering spectroscopic survey would be powerful for constraining the BD theory and other modified gravity theories.
文献关键词：
中图分类号：
作者姓名：
Anda Chen;Yan Gong;Fengquan Wu;Yougang Wang;Xuelei Chen
作者机构：
Key Laboratory of Space Astronomy and Technology,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;School of Astronomy and Space Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Science Center for China Space Station Telescope,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;Key Laboratory of Computational Astrophysics,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;Center for High Energy Physics,Peking University,Beijing 100871,China
文献出处：
引用格式：
[1]Anda Chen;Yan Gong;Fengquan Wu;Yougang Wang;Xuelei Chen-.Constraining Brans-Dicke Cosmology with the CSST Galaxy Clustering Spectroscopic Survey)[J].天文和天体物理学研究,2022(05):190-198
A类：
Brans,Cosmology,zCOSMOS
B类：
Constraining,Dicke,CSST,Galaxy,Clustering,Spectroscopic,Survey,BD,theory,simplest,Scalar,Tensor,gravity,which,considered,candidate,modified,Einstein,general,relativity,In,this,work,forecast,constraints,galaxy,clustering,spectroscopic,survey,magnitude,limit,AB,point,source,detection,We,generate,mock,data,catalog,observational,instrumental,effects,predict,spectra,from,bias,other,systematical,parameters,also,included,Markov,Chain,Monte,Carlo,technique,employed,find,best,fits,probability,distributions,cosmological,introduced,satisfies,ln,1+1,that,give,equivalently,under,assumption,These,almost,same,order,compared,joint,using,current,cosmic,microwave,background,baryon,acoustic,oscillations,Type,Ia,supernova,indicating,would,powerful,constraining,theories
AB值：
0.539536
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