English  |  正體中文  |  简体中文  |  Items with full text/Total items : 65318/65318 (100%)
Visitors : 22089846      Online Users : 1161
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50904


    Title: ORIGIN OF THE FERMI BUBBLE
    Authors: Cheng,KS;Chernyshov,DO;Dogiel,VA;Ko,CM;Ip,WH
    Contributors: 天文研究所
    Keywords: GALACTIC-CENTER;BLACK-HOLE;INTERSTELLAR-MEDIUM;RAY-EMISSION;A-ASTERISK;DISCOVERY;WIND;B2
    Date: 2011
    Issue Date: 2012-03-27 18:12:36 (UTC+8)
    Publisher: 國立中央大學
    Abstract: Fermi has discovered two giant gamma-ray-emitting bubbles that extend nearly 10 kpc in diameter north and south of the Galactic center. The existence of the bubbles was first evidenced in X-rays detected by ROSAT and later WMAP detected an excess of radio signals at the location of the gamma-ray bubbles. We propose that periodic star capture processes by the galactic supermassive black hole, Sgr A*, with a capture rate 3 x 10(-5) yr(-1) and energy release similar to 3 x 10(52) erg per capture can produce very hot plasma similar to 10 keV with a wind velocity similar to 10(8) cm s(-1) injected into the halo and heat up the halo gas to similar to 1 keV, which produces thermal X-rays. The periodic injection of hot plasma can produce shocks in the halo and accelerate electrons to similar to TeV, which produce radio emission via synchrotron radiation and gamma rays via inverse Compton scattering with the relic and the galactic soft photons.
    Relation: ASTROPHYSICAL JOURNAL LETTERS
    Appears in Collections:[天文研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML276View/Open


    All items in NCUIR are protected by copyright, with all rights reserved.

    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 ©   - Feedback  - 隱私權政策聲明