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 987654321/27906
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 67783/67783 (100%)
造訪人次 : 23023313      線上人數 : 186
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/987654321/27906


    題名: Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XIII. Ultraviolet observations of the broad-line radio galaxy 3C 390.3
    作者: O'Brien,PT;Dietrich,M;Leighly,K;Alloin,D;Clavel,J;Crenshaw,DM;Horne,K;Kriss,GA;Krolik,JH;Malkan,MA;Netzer,H;Peterson,BM;Reichert,GA;Rodriguez-Pascual,PM;Wamsteker,W;Anderson,KSJ;Bochkarev,NG;Cheng,FZ;Filippenko,AV;Gas
    貢獻者: 天文研究所
    關鍵詞: SHORT-TIMESCALE VARIABILITY;MULTIWAVELENGTH OBSERVATIONS;X-RAY;EMISSION-LINES;OPTICAL WAVELENGTHS;ACCRETION DISKS;UV CONTINUUM;NGC-5548;NGC-4151;3C-390.3
    日期: 1998
    上傳時間: 2010-06-29 19:35:54 (UTC+8)
    出版者: 中央大學
    摘要: As part of an extensive multiwavelength monitoring campaign, the Inter national Ultraviolet Explorer satellite was used to observe the broad-line radio galaxy 3C 390.3 during the period 1994 December 31-1996 March 5. Spectra were obtained every 6-10 days. The UV continuum varied by a factor of 7 through the campaign, while the broad emission lines varied by factors of 2-5. Unlike previously monitored Seyfert 1 galaxies, in which the X-ray continuum generally varies with a larger amplitude than the UV, in 3C 390.3 the UV continuum light curve is similar in both amplitude and shape to the X-ray light curve observed by ROSAT. The UV broad emission-line variability lags that of the UV continuum by 35-70 days for Ly alpha and C rv, values larger than those found for Seyfert 1 galaxies of comparable UV luminosity. These lags are also larger than those found for the Balmer lines in 3C 390.3 over the same period. The red and blue wings of C rv and Ly alpha vary in phase, suggesting that radial motion does not dominate the kinematics of the UV line-emitting gas. Comparison with archival data provides evidence for velocity-dependent changes in the Ly alpha and C rv line profiles, indicating evolution in the detailed properties and/or distribution of the broad-line emitting gas.
    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.html0KbHTML338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 ©   - 回饋  - 隱私權政策聲明