English  |  正體中文  |  简体中文  |  Items with full text/Total items : 70585/70585 (100%)
Visitors : 23116436      Online Users : 634
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/987654321/50944

    Title: Whole Earth Telescope observations of the subdwarf B star KPD 1930+2752: a rich, short-period pulsator in a close binary
    Authors: Reed,MD;Harms,SL;Poindexter,S;Zhou,AY;Eggen,JR;Morris,MA;Quint,AC;McDaniel,S;Baran,A;Dolez,N;Kawaler,SD;Kurtz,DW;Moskalik,P;Riddle,R;Zola,S;Ostensen,RH;Solheim,JE;Kepler,SO;Costa,AFM;Provencal,JL;Mullally,F;Winget,DW;Vuckovic,M;Crowe,R;Terry,D;Avila,R;Berkey,B;Stewart,S;Bodnarik,J;Bolton,D;Binder,PM;Sekiguchi,K;Sullivan,DJ;Kim,SL;Chen,WP;Chen,CW;Lin,HC;Jian,XJ;Wu,H;Gou,JP;Liu,Z;Leibowitz,E;Lipkin,Y;Akan,C;Cakirli,O;Janulis,R;Pretorius,R;Ogloza,W;Stachowski,G;Paparo,M;Szabo,R;Csubry,Z;Zsuffa,D;Silvotti,R;Marinoni,S;Bruni,I;Vauclair,G;Chevreton,M;Matthews,JM;Cameron,C;Pablo,H
    Contributors: 天文研究所
    Date: 2011
    Issue Date: 2012-03-27 18:13:23 (UTC+8)
    Publisher: 國立中央大學
    Abstract: KPD 1930+2752 is a short-period pulsating subdwarf B (sdB) star. It is also an ellipsoidal variable with a known binary period of 2.3 h. The companion is most likely a white dwarf and the total mass of the system is close to the Chandresekhar limit. In this paper, we report the results of Whole Earth Telescope (WET) photometric observations during 2003 and a smaller multisite campaign of 2002. From 355 h of WET data, we detect 68 pulsation frequencies and suggest an additional 13 frequencies within a crowded and complex temporal spectrum between 3065 and 6343 mu Hz (periods between 326 and 157 s). We examine pulsation properties including phase and amplitude stability in an attempt to understand the nature of the pulsation mechanism. We examine a stochastic mechanism by comparing amplitude variations with simulated stochastic data. We also use the binary nature of KPD 1930+2752 for identifying pulsation modes via multiplet structure and a tidally induced pulsation geometry. Our results indicate a complicated pulsation structure that includes short-period (approximate to 16 h) amplitude variability, rotationally split modes, tidally induced modes and some pulsations which are geometrically limited on the sdB star.
    Appears in Collections:[天文研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat

    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