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题名: Constraining Equation of State of Dark Matter: Including Weak Gravitational Lensing
作者: Yang, L;  Yang, WQ;  Xu, LX
刊名: CHINESE PHYSICS LETTERS
出版日期: 2015
卷号: 32, 期号:5, 页码:59801
学科分类: Physics
DOI: http://dx.doi.org/10.1088/0256-307X/32/5/059801
通讯作者: Xu, LX (reprint author), Dalian Univ Technol, Inst Theoret Phys, Sch Phys & Optoelect Technol, Dalian 116024, Peoples R China.
文章类型: Article
英文摘要: Usually the equation of state (EoS) of dark matter is zero when it is cold, however there exists the possibility of a (effective) nonzero EoS of dark matter due to its decay and interaction with dark energy. In this work, we try to constrain the EoS of dark matter w(dm) using the currently available cosmic observations which include the geometrical and dynamical measurements. For the geometrical measurements, the luminosity distance of type Ia supernovae, the angular diameter distance and comoving sound horizon from baryon acoustic oscillations and the cosmic microwave background radiation will be employed. The data points from the redshift-space distortion and weak gravitational lensing will be taken as dynamical measurements. Using the Markov chain Monte Carlo method, we obtain a very tight constraint on the EoS of dark matter: w(dm) = 0.0000532(-0.000686-0.00136-0.00177)(+0.000692+0.00136+0.00183)
类目[WOS]: Physics, Multidisciplinary
关键词[WOS]: BARYON ACOUSTIC-OSCILLATIONS ;  COSMOLOGICAL CONSTRAINTS ;  HUBBLE CONSTANT ;  GROWTH-RATE ;  ENERGY ;  ALIGNMENTS ;  DISTANCE ;  IMPACT
收录类别: SCI
项目资助者: National Natural Science Foundation of China [11275035]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21015
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
Yang, L,Yang, WQ,Xu, LX. Constraining Equation of State of Dark Matter: Including Weak Gravitational Lensing[J]. CHINESE PHYSICS LETTERS,2015,32(5):59801.
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