English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 78728/78728 (100%)
造訪人次 : 33357148      線上人數 : 504
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋


    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


    題名: 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
    貢獻者: 天文研究所
    關鍵詞: DIGITAL SKY SURVEY;XMM-NEWTON OBSERVATION;DARK-MATTER;STAR-FORMATION;RICHNESS RELATION;LEGACY SURVEY;CLUSTER;WEAK;MASS;MAXBCG
    日期: 2011
    上傳時間: 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
    顯示於類別:[天文研究所] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    index.html0KbHTML518檢視/開啟


    在NCUIR中所有的資料項目都受到原著作權保護.

    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 ©   - 隱私權政策聲明