中国科学院紫金山天文台机构知识库
Advanced  
PMO OpenIR  > 院士文集  > 陆埮  > 期刊论文
题名: Deviation from the cosmological constant or systematic errors?
作者: Qi Shi(祈石)1, 2, 3; Lu Tan(陆埮)1, 2; Wang, Fa-Yin4
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期: 2009-09-01
卷号: 398, 期号:1, 页码:L78-L82
关键词: supernovae: general ; cosmological parameters ; gamma-rays: bursts
学科分类: Astronomy & Astrophysics
DOI: 10.1111/j.1745-3933.2009.00713.x
文章类型: Article
英文摘要: In the work of Qi, Wang & Lu, gamma-ray bursts (GRBs) are used together with an earlier Type Ia supernova (SN Ia) data set to constrain the dark energy equation of state (EOS) in a nearly model-independent way. The improvements made by including GRBs show a slight shift of the dark energy EOS toward w > -1 at redshifts z greater than or similar to 0.5. It is interesting that, when we have more SNe Ia, SNe Ia themselves also show the same trend. Motivated by the fact that both SNe Ia and GRBs seem to prefer a dark energy EOS greater than -1 at redshifts z greater than or similar to 0.5, we perform a careful investigation of this situation, including more careful treatments of measurement errors of GRBs and cross-checking the results by using different ways of including GRBs. We find that the deviation of dark energy from the cosmological constant at redshifts z greater than or similar to 0.5 is large enough that we should pay close attention to it with future observational data. Such a deviation may arise from some biasing systematic errors in the handling of SNe Ia and/or GRBs, or more interestingly from the nature of the dark energy itself.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: GAMMA-RAY BURSTS ; DIGITAL SKY SURVEY ; DARK ENERGY ; IA SUPERNOVAE ; HUBBLE DIAGRAM ; LIGHT CURVES ; CONSTRAINTS ; GALAXIES ; CFA
收录类别: SCI
语种: 英语
WOS记录号: WOS:000269136800017
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/11046
Appears in Collections:陆埮_期刊论文

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
175-2009-MNRAS-Qi-Lu-Wang-Deviation from the Cosmological Constant or Systematic Errors-398#L78-82.pdf(164KB)----开放获取View Download

作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China
3.CAS, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
4.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China

Recommended Citation:
祁 石、陆 埮、王发印.Deviation from the Cosmological Constant or Systematic Errors? ,Mon. Not. Roy. Astron. Soc.,2009,398(L78-L82):
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Qi, Shi]'s Articles
[Lu, Tan]'s Articles
[Wang, Fa-Yin]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Qi, Shi]‘s Articles
[Lu, Tan]‘s Articles
[Wang, Fa-Yin]‘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: 175-2009-MNRAS-Qi-Lu-Wang-Deviation from the Cosmological Constant or Systematic Errors-398#L78-82.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  中国科学院紫金山天文台 - Feedback
Powered by CSpace