博碩士論文 942209008 詳細資訊




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姓名 林省文(Hsing-Wen Lin)  查詢紙本館藏   畢業系所 天文研究所
論文名稱 在加法黃道面巡天資料中尋找古柏帶雙星系統
(A search for Kuiper belt objects in the CFEPS Samples)
相關論文
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摘要(中) 目前大約有百分之十的古柏帶天體為雙星系統,然而這個結論還不是很確定。而這些古柏帶雙星卻關聯著太陽系中行星的形成機制。所以尋找更多的古柏帶雙星系統是重要的工作。所以我們加入了加拿大--法國黃道面巡天,在這個計畫的古柏帶天體影像中尋找未知的古柏帶雙星。我們挑選出六十二個適合的目標,並發現一個新的古柏帶雙星系統與一個可能的雙星。這個結果告訴我們有百分之一點三的古柏帶天體是雙星系統,與之前的相關研究結論相輔。然而這個結論仍有很大的不確定性,所以未來我們將進行更多的相關研究。
摘要(英) The binary KBOs that make up a fraction of about 10% of the total KBO population are still an enigma. Their formation history and dynamical evolution are closely related to the accretion process and collision processes of the early solar system. A comprehensive census of KBO binaries is therefore an important goal in planetary research. We have initiated just such a project to search for KBO binaries in the distant moving objects data from the Canada France Ecliptic plane Surveys (CFEPS). We also developed a pipeline program to identify the binary object from the CFEPS data. We checked 62
bright objects with good image quality and find a number of possible binaries. One of these was confirmed as a binary. The wide binary fraction of KBOs for this result is about 1/62 and consistent with previous research. However this result is uncertain, so more observations for a binary search are needed.
關鍵字(中) ★ 雙星系統
★ 古柏帶天體
★ 古柏帶
★ 小行星
關鍵字(英) ★ asteroid
★ Kuiper Belt
★ Kuiper Belt Object
★ binary system
論文目次 1 Introduction 1
1.1 The Kuiper Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Binaries in the Kuiper Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.3 Published Transneptunian Binary Surveys . . . . . . . . . . . . . . . . . . 6
1.4 Binary fraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Binary Formation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.5.1 Capture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.5.2 Collision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.5.3 Hybrids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 Canada France Eclpitic Plane Survey and Binary KBOs search 10
2.1 Canada France Eclpitic Plane Survey . . . . . . . . . . . . . . . . . . . . . 10
2.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.2 Binary KBO searching project . . . . . . . . . . . . . . . . . . . . . 10
2.2 Binary searching method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.1 Point spread function of CFHT/MegaCam . . . . . . . . . . . . . . 11
2.2.2 Detection Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 Detecting Program and Binary detectability . . . . . . . . . . . . . . . . . 16
2.3.1 Semi-auto detecting program . . . . . . . . . . . . . . . . . . . . . 16
2.3.2 Binary detectability . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.4 Searching Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3 Result:Binary Candidates 22
3.1 False detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.2 Binary Candidates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2.1 L5c02 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2.2 L4k12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4 Discussion 26
4.1 Binary Possibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.2 Physical Quantities of L5c02 . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.2.1 Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.2.2 Orbital elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2.3 Brightness, Diameter Ratio and Mass Ratio . . . . . . . . . . . . . 27
4.3 Binary Fraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5 Conclusion 32
6 bibliography 33
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指導教授 葉永烜(Wing-Huen Ip) 審核日期 2008-7-20
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