中大機構典藏-NCU Institutional Repository-提供博碩士論文、考古題、期刊論文、研究計畫等下載:Item 987654321/50928
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 66984/66984 (100%)
造访人次 : 23055414      在线人数 : 181
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/50928


    题名: THE SERENDIPITOUS OBSERVATION OF A GRAVITATIONALLY LENSED GALAXY AT z=0.9057 FROM THE BLANCO COSMOLOGY SURVEY: THE ELLIOT ARC
    作者: Buckley-Geer,EJ;Lin,H;Drabek,ER;Allam,SS;Tucker,DL;Armstrong,R;Barkhouse,WA;Bertin,E;Brodwin,M;Desai,S;Frieman,JA;Hansen,SM;High,FW;Mohr,JJ;Lin,YT;Ngeow,CC;Rest,A;Smith,RC;Song,J;Zenteno,A
    贡献者: 天文研究所
    关键词: DIGITAL SKY SURVEY;XMM-NEWTON OBSERVATION;DARK-MATTER;STAR-FORMATION;RICHNESS RELATION;LEGACY SURVEY;CLUSTER;WEAK;MASS;MAXBCG
    日期: 2011
    上传时间: 2012-03-27 18:13:05 (UTC+8)
    出版者: 國立中央大學
    摘要: We report on the serendipitous discovery in the Blanco Cosmology Survey (BCS) imaging data of a z = 0.9057 galaxy that is being strongly lensed by a massive galaxy cluster at a redshift of z = 0.3838. The lens (BCS J2352-5452) was discovered while examining i- and z-band images being acquired in 2006 October during a BCS observing run. Follow-up spectroscopic observations with the Gemini Multi-Object Spectrograph instrument on the Gemini-South 8 m telescope confirmed the lensing nature of this system. Using weak-plus-strong lensing, velocity dispersion, cluster richness N(200), and fitting to a Navarro-Frenk-White (NFW) cluster mass density profile, we have made three independent estimates of the mass M(200) which are all very consistent with each other. The combination of the results from the three methods gives M(200) = (5.1 +/- 1.3) x 10(14) M(circle dot), which is fully consistent with the individual measurements. The final NFW concentration c(200) from the combined fit is c(200) = 5.4(1.1)(+1.4) We have compared our measurements of M(200) and c(200) with predictions for (1) clusters from ACDM simulations, (2) lensing-selected clusters from simulations, and (3) a real sample of cluster lenses. We find that we are most compatible with the predictions for ACDM simulations for lensing clusters, and we see no evidence based on this one system for an increased concentration compared to ACDM. Finally, using the flux measured from the [O(II)]3727 line we have determined the star formation rate of the source galaxy and find it to be rather modest given the assumed lens magnification.
    關聯: ASTROPHYSICAL JOURNAL
    显示于类别:[天文研究所] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    index.html0KbHTML282检视/开启


    在NCUIR中所有的数据项都受到原著作权保护.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈  - 隱私權政策聲明