疏散星團NGC 1513與NGC 225中的食雙星測光分析

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姓名

鄭秉漢(Ping-Han Cheng) 查詢紙本館藏

畢業系所

天文研究所

論文名稱

疏散星團NGC 1513與NGC 225中的食雙星測光分析
(Photometric Study and Time-Series Analysis of the Open Clusters NGC 1513 and NGC 225)

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摘要(中)

我們的研究目標為觀測兩個疏散星團NGC 1513 及NGC 225，進行測光、光變分析得到食雙星，最後再藉由自製的基本雙星數值模型來比對觀測資料。使用的觀測數據來自美國亞利桑那州的81 厘米Tenagra II 望遠鏡，其於2009 年的其中60 天的觀測資料。接著使用一套使用多年、標準地變星分析流程來研究疏散星團中的變星。除了對 NGC1513 和 NGC 225 所進行的測光研究為主，為了解在 NGC 1513 和 NGC225 中的食雙星的特徵及原理，我們也發展了基本的雙星數值模型來比對我們的觀測資料。並且創造了一些虛擬的觀測數據來證明模型的精確性。最後，在這兩個星團中共發現12 顆變星，包括了6 顆食雙星，也模擬了這6 顆食雙星的物理參數，從而建立食雙星的環境。

摘要(英)

Time-series photometric observations were carried over sixty nights in 2009
using the 81-cm Tenagra telescope in Arizona within the framework of a multi-year
survey program of variable stars in open clusters. The analysis of NGC 1513 and
NGC 225 was a pilot study of this effort, we also developed the basic algorithms
of the eclipsing binary to compute the data points from our observations to
understand the characteristics of eclipsing binary stars in NGC 1513 and NGC
225. About the model, we create some invented observation data to prove the
accuracy of its. Totally we find the 12 variable stars including 6 eclipsing
binaries in NGC 1513 and NGC 225 and get the results of the model fitting of
eclipsing binaries.

關鍵字(中)

★ 雙星

關鍵字(英)

★ Eclipsing Binary

論文目次

中文摘要…………………………………………………………… i
英文摘要 ………………………………………………………… ii
誌謝 ……………………………………………………………… iii
目錄 ……………………………………………………………… iv
表目錄 …………………………………………………………… vi
圖目錄 …………………………………………………………… vii
一、緒論 1
1-1 食雙星的發現與觀測 ………………………………………… 1
1-2 食雙星的生成與環境 ………………………………………… 3
1-3 恆星特性 ……………………………………………………… 4
1-3-1 邊際暗淡效應 ……………………………………………… 4
1-3-2 洛西瓣 ……………………………………………………… 6
1-4 食雙星的光度曲線與物理參數 ……………………………… 7
1-5 食雙星模擬的發展 …………………………………………… 9
1-6 研究目的 ……………………………………………………… 12
二、觀測與資料處理 13
2-1 觀測計畫 ……………………………………………………… 13
2-1-1 觀測目標 …………………………………………………… 13
2-1-2 觀測系統 …………………………………………………… 16
2-1-3 觀測策略 …………………………………………………… 18
2-2 資料分析流程 ………………………………………………… 20
2-3 觀測資料預處理 ……………………………………………… 22
2-3-1 偏壓、暗電流、平場 ……………………………………… 22
2-3-2 觀測影像位置校正 ………………………………………… 25
2-4 光度校正及分析 ……………………………………………… 26
2-4-1 光度取得 …………………………………………………… 26
2-4-2 標準星校正 ………………………………………………… 28
2-4-3 參考星校正 ………………………………………………… 28
2-5 光度分析結果 ………………………………………………… 30
三、變星的光變曲線 32
3-1 變星挑選 ……………………………………………………… 32
3-2 變星週期計算 ………………………………………………… 33
3-3 食雙星的光變週期曲線 ……………………………………… 34
四、自製模型模擬光變曲線 44
4-1 模型原理及雙星物理參數 …………………………………… 44
4-2 模擬結果與討論 ……………………………………………… 45
五、討論與結論 52
六、總結與未來展望 55
6-1 總結 …………………………………………………………… 55
6-2 未來展望 ……………………………………………………… 56
七、參考文獻 ……………………………………………………… 57
附錄：數學數值模擬基本原理 …………………………………… 61

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指導教授

葉永烜(Wing-Huen Ip)

審核日期

2011-6-28

推文