中国科学院理论物理研究所机构知识库
Advanced  
ITP OpenIR  > 理论物理所1978-2010年知识产出  > 期刊论文
题名: Probing the dynamical behavior of dark energy
作者: 蔡荣根 ;  Su, Qiping ;  Zhang, Hong-Bo
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2010
期号: 4, 页码:-
关键词: MATTER ;  SUPERNOVAE ;  UNIVERSE ;  MODEL ;  CONSTRAINTS ;  GALAXIES ;  AGE
学科分类: Physics
通讯作者: Cai, RG , Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, POB 2735, Beijing 100190, Peoples R China
部门归属: [Cai, RG; Su, QP; Zhang, HB] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China
英文摘要: We investigate dynamical behavior of the equation of state of dark energy w(de) by employing the linear-spline method in the region of low redshifts from observational data (SnIa, BAO, CMB and 12 H(z) data). The redshift is binned and w(de) is approximated by a linear expansion of redshift in each bin. We leave the divided points of redshift bins as free parameters of the model, the best-fitted values of divided points will represent the turning positions of w(de) where w(de) changes its evolving direction significantly (if there exist such turnings in our considered region). These turning points are natural divided points of redshift bins, and w(de) between two nearby divided points can be well approximated by a linear expansion of redshift. We find two turning points of w(de) in z is an element of (0, 1.8) and one turning point in z is an element of (0, 0.9), and w(de)(z) could be oscillating around w = -1. Moreover, we find that there is a 2 sigma deviation of w(de) from -1 around z = 0.9 in both correlated and uncorrelated estimates.
资助者: NNSF of China[10821504, 10975168]; National Basic Research Program of China[2010CB833000]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000277684600021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5137
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
Probing the dynamical behavior of dark energy.pdf(242KB)----开放获取View Download

Recommended Citation:
Cai, Rong-Gen,Su, Qiping,Zhang, Hong-Bo. Probing the dynamical behavior of dark energy[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(4):-.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Cai, Rong-Gen]'s Articles
 [Su, Qiping]'s Articles
 [Zhang, Hong-Bo]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Cai, Rong-Gen]‘s Articles
 [Su, Qiping]‘s Articles
 [Zhang, Hong-Bo]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
文件名: Probing the dynamical behavior of dark energy.pdf
格式: Adobe PDF
此文件暂不支持浏览
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院理论物理研究所 - Feedback
Powered by CSpace