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 987654321/50861
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 65318/65318 (100%)
造访人次 : 21984364      在线人数 : 180
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/987654321/50861


    题名: Discovery of Variable Stars in the Field of the Galactic Open Cluster NGC 7039
    作者: Hu,JH;Chen,HC;Chen,YT;Chang,DC;Lin,HW;Ngeow,CC;Chen,WP;Ip,WH
    贡献者: 天文研究所
    关键词: CATALOG;PARAMETERS;PHOTOMETRY
    日期: 2011
    上传时间: 2012-03-27 18:11:35 (UTC+8)
    出版者: 國立中央大學
    摘要: We report variable stars identified in the field of the Galactic open cluster, NGC 7039. In the fall/winter of 2009, imaging photometry has been acquired, mainly in the R band, for eight open clusters using the 81 cm Tenagra telescope in Arizona. We present the results for our first target, NGC 7039. We have found 42 new variable stars and six suspected variable stars. Among the variable stars, there are 14 eclipsing binaries, including one RS Callum Venaticorum-type system, one RR Lyrae, two Cepheid, one beta Cephei, three delta Scuti, eight pulsating-like stars, five variable stars with periods longer than the observation window of 41 days, and eight irregular variable stars. Two contact binary systems could be members of NGC 7039 because of their loci in the color-magnitude diagram and their distance moduli close to that of the open cluster. One of the contact binary systems shows infrared excess in the (J - H) and (H - K(s)) diagrams. It could have circumstellar dust. None of the pulsating stars belong to the open cluster.
    關聯: PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
    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.html0KbHTML340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