研究生: |
王立涵 |
---|---|
論文名稱: |
EAST觀測網數據處理程序與變星研究 Data Reduction of EAST Network and Variables Research |
指導教授: | 周定一 |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
理學院 - 天文研究所 Institute of Astronomy |
論文出版年: | 2007 |
畢業學年度: | 95 |
語文別: | 中文 |
論文頁數: | 110 |
中文關鍵詞: | 變星 、盾牌座變星 、星震 、頻率分析 、仙王座變星 |
外文關鍵詞: | EAST, V830 Her, V350 Peg, frequency analysis, asteroSeimology, GSC 2102-1429 |
相關次數: | 點閱:2 下載:0 |
分享至: |
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
臺灣地暉星震觀測網(Taiwan Earthshine and AsteroSeimology Telescope Network, EAST)為即將陸續建置的全球性觀測網,而星震為其科學課題之一,星震本身需要長時間的連續數據,以求能對於星光變化的頻率測量能精準,而全球性的觀測網能以接力觀測的方式達成長時間的連續數據,目前EAST觀測網已經於西班牙屬迦納利群島的 Tenerife 島上有第一個觀測站,此外在新竹清華大學的物理系館樓上也有一測試用的站台,並即將在 2007 年七月建置烏茲別克的觀測站。
本研究使用 EAST 的數據,對於幾顆已知的變星進行觀測與分析,
包含盾牌座δ型(δ Scuti)變星 BI CMi、V350 Peg、V830 Her 共三顆,仙王座β型(β Cephei)變星LR Gem一顆,以求了解整體觀測的能力;此外發展觀測網的數據處理程序以及影像分析程序,並使用快速傅利葉轉換進行最簡單的頻率分析,最終希望能大量而迅速的在一組影像中檢索出可能為變星的目標。
對於 BI CMi,共 1 晚數據可用,可以在光度曲線上找到約 0.12 天的變化週期;對於 V350 Peg 共 13 晚數據可用,光度曲線上可以找到約 0.175 天的變化週期,而 FFT 結果初步給出 0.2 天的週期,接近已知的週期 0.2011 天,但可能是由截斷效應所貢獻;對於 V830 Her 共 5 晚數據可用,光度曲線上可以找到約 0.18 天的變化週期, FFT 結果初步給出 0.1734 天的週期,接近已知週期的 0.1772 天;對於 LR Gem 共 1 晚數據可用,光度曲線上可能可以推測半個變化週期是 0.2 天,所以可能可以假設它有 0.4 天的週期,不符合已經被報告的 0.238 天週期,此外數據量不足,無法進一步結論。
此外,對於 V830 Her 視野內的另一顆星 GSC 2102-1429,找到疑似週期性變光的情形,按光度曲線結果其可能週期約為 0.15 天至 0.2 天。
Taiwan Earthshine and AsteroSeimology Telescope Network (EAST) is a global network that will be come true.
Asteroseimology, one science topic of EAST network, need continuous data to analyze frequency of flux variation of stars. And, longer total lenghth of data is better for frequency analysis. So global network is a feasible scheme.
Now, the first system of EAST had been established at Teide Observatory, Tenerife, Canary Island, Spain.
EAST station can work automatically or controlled reomtely through the Internet. And the second system will be established in Uzbekistan this summer.
In this thesis, a data reduction procedure of EAST system is presented. We develope some methods to remove signal not from stars. And two procedures, finding stars and photometry is developed for image analysis. Finally, we plot the light curve and analyze frequency of variation of light curve, using fast fourier transform.
We observe three δ Scuti stars, BI CMi, V350 Peg and V830 Her.
For BI CMi, we can roughly find period of 0.12 day in the light curve. For V350 Peg, we can roughly find period of 0.175 day in the light curve. And a period of 0.2 day is given by FFT. It isn't believable enough because leakage.
For V830 Her, we can roughly find period of 0.18 day in the light curve. And a period of 0.1734 day is given by FFT.
It match known period from the hipparcos catalogue. We observe one β Cephei star, LR Gem. For LR Gem, we has poor data to check its period.
Besides, A suspected variable star, GSC 2102-1429 is presented. We suspect a period of 0.15 ~ 0.2 day for GSC 2102-1429.
1. 吳俊賢 (2001, 清大碩士論文), 地暉觀測系統之設計與製作
2. 賴樹偉 (2003, 清大碩士論文), 地暉望遠鏡自動化系統軟體與數據分析
3. 張靖歆 (2006, 清大碩士論文), 觀測網之星震數據分析: GN And 與 BI CMi 之光度曲線
4. Numerical Recipes in C, 2nd ,Cambridge Univ. Press
5. R. J. Hanisch, A. Farris, E. W. Greisen, W. D. Pence, B. M. Schlesinger, P. J. Teuben, R. W. Thompson, and A. Warnock III(2001 A\&A), Definition of the Flexible Image Transport System (FITS)
6. Perryman, M.A.C. and Lindegren, L. and Kovalevsky, J. and Hoeg, E. and Bastian, U. and Bernacca, P.L. and Cre'ze', M. and Donati, F. and Grenon, M. and van Leeuwen, F. and van der Marel, H. and Mignard, F. and Murray, C.A. and Le Poole, R.S. and Schrijver, H. and Turon, C. and Arenou, F. and Froeschle', M. and Petersen, C.S. ,(1997, A\&A), The Hipparcos Catalogue
7. Peter B. Stetson(1987, PASP), DAOPHOT: A Computer Program For Crowded-Filed Stellar Photometry
8. Kenneth J. Mighell (2005, MNRAS), Stellar Photometry and Astrometry with Discrete Point Spread Functions
9. Trujillo, I.; Aguerri, J. A. L.; Cepa, J.; Gutie'rrez, C. M.(2006, MNRAS), The effects of seeing on Se'rsic profiles - II. The Moffat PSF
10. Pen~a, J. H.; Sareyan, J. P.; Cervantes-Sodi, B.; Pen~a, R.; Alvarez, M.; Cano, M.; Sorcia, M. A., HD 115520, a new δ Scuti star
11. M. Breger, R. Garrido, G. Handler, M.A. Wood, R.R. Shobbrook, K.M. Bischof, F. Rodler, R. O. Gray, A. Stankov, P. Martinez, D. O'Donoghue, R. Szabo', W. Zima, A. B. Kaye, C. Barban, U. Heiter (2002, MNRAS ), 29 frequencies for the δ Scuti variable BI CMi: the 1997-2000 multisite campaigns
12. Vidal-Sa'inz, J.; Wils, P.; Lampens, P.; Garci'a-Melendo, E. ,(2002 A\&A), The multiple frequencies of the δ Scuti star V350 Peg
13. Vidal-Sa'inz, J.; Garcia-Melendo, E.; Lampens, P.; van Cauteren, P.; Wils, P.(2003 CoAst.), Follow-up observations of the DSCT V350 Peg
14. Anamarija Stankov, Gerald Handler, (2005, ApJ){\it CATALOG OF GALACTIC β CEPHEI STARS}
15. Smolec, R.; Moskalik, P.(2007,MNRAS), Amplitude saturation in β Cephei models
16. Mazumdar, A.; Briquet, M.; Desmet, M.; Aerts, C.(2006, A\&A), An asteroseismic study of the β Cephei star β Canis Majoris
17. Daszynska-Daszkiewicz, J.; Pigulski, A.(2006,ESASP),Pulsational properties of the Cephei star SY Equ from combined photometric and spectroscopic observations
18. Shobbrook, R. R.; Handler, G.; Lorenz, D.; Mogorosi, D.(2006, MNRAS, Photometric studies of three multiperiodic β Cephei stars: β CMa, 15 CMa and KZ Mus
19. Handler, G.; Jerzykiewicz, M.; Rodri'guez, E.; Uytterhoeven, K.; Amado, P. J.; Dorokhova, T. N.; Dorokhov, N. I.; Poretti, E.; Sareyan, J.-P.; Parrao, L.; and 21 coauthors(2006, MNRAS), Asteroseismology of the β Cephei star 12 (DD) Lacertae: photometric observations, pulsational frequency analysis and mode identification
20. Desmet, M.; Briquet, M.; Mazumdar, A.; Aerts, C. (2006, CoAst 147), An asteroseismic study of the beta Cephei star beta Canis Majoris
21.Hill, Graham ,(1967),{\it On Beta Cephei stars: A search for Beta Cephei stars}
22. Charles E. Worley , Brian D. Mason, (1998, AJ),Micrometer Measures of Double Stars
23. W. D. Heintz, (1998, ApJ), Observations of Double Stars. XVIII.