跳到主要內容

簡易檢索 / 詳目顯示

研究生: 洪莉雯
Li-Wen Hung
論文名稱: Nova KT Eridani 2009 的可見光與X-ray觀測
Optical and X-ray Observations of the Nova KT Eridani 2009
指導教授: 陳文屏
Wen-Ping Chen
口試委員:
學位類別: 碩士
Master
系所名稱: 理學院 - 天文研究所
Graduate Institute of Astronomy
畢業學年度: 99
語文別: 英文
論文頁數: 35
中文關鍵詞: 可見光光變曲線伴星週期洛西瓣吸積盤新星緊密雙星
外文關鍵詞: period, optical, X-ray, accretion disk, recurrent nova, Nova, companion, Roche lobe, hot spot
相關次數: 點閱:15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
  • Nova KT Eridani於2009年11月爆發,並於2009年11月14日到達了最大亮度5.4等,之後其亮度下降非常快速,並且在2011年3月的時候回到了寧靜態,亮度約為15等。在2010年3月31日SWIFT太空望遠鏡24小時持續監測這顆星的X-ray變化,我們利用地面望遠鏡在台灣鹿林、美國亞歷桑那州Tenagra以及智利CTIO天文台SMARTS提供可見光同步觀測。我們比較在同步觀測這一天X-ray和可見光的關係。此外我們蒐集了美國變星觀測者協會 (AAVSO) 觀測此目標星的星等變化,以及新星爆發後期我們持續監測,得到此顆星從爆發到回到寧靜期的光變曲線,並且做週期分析找出了56.7天的周期,我們認為這很有可能是雙星系統中,吸積盤上熱點 (hot-spot) 所造成的週期。我們的研究支持KT Eri是顆再發性的新星 (recurrent nova),而其伴星很有可能是K0光譜型態的巨星。


    The nova KT Eri exploded in November 2009. The peak brightness reached 5.4 mag at 2009 November 14.63 UT. After then, the brightness has faded very fast and went into its quiescence (V~15) in the spring 2011. On March 31, 2010, Swift undertook a 24-hour monitoring of this nova, for which we provided ground-based CCD imaging photometric measurements taken with telescopes at Lulin (Taiwan), Tenagra (Arizona), and SMARTS/CTIO (Chile) covering the day before, during, and the day after the Swift campaign. The X-ray and optical light curves are compared. We also present long-term optical light curves and find a period of 56.7 days, which we interpreat as due to the hot spot on the WD accretion disk. We propose the companion of KT Eri to be a giant of an early K type.

    Contents-------------------------------------- i List of Figures------------------------------- ii List of Tables------------------------------- iii 1. Introduction-------------------------------- 1 1.1 Novae------------------------------------- 1 1.2 KT Eri------------------------------------ 5 2. Observations and Data Analysis--------- 6 2.1 The SWIFT Campaign------------------- 6 2.2 Long-term Optical Light Curve-------- 11 3. Discussion-------------------------------- 13 3.1 X-ray and Optical Variations---------- 13 3.2 Periodogram Analysis------------------ 16 4. Conclusion-------------------------------- 22 Bibliography--------------------------------- 23

    1. Anupama, G. C. 2008, in ASP Conf. Ser. 401, RS Ophiuchi(2006) and the Recurrent Nova Phenomenon, ed. A. Evans et al. (San Francisco, CA: ASP), 31
    2. Bessell, M. S. & Brett, J. M., 1988, PASP, 100, 1134
    3. Bode, M. F., et al., 2010, ATel, 2392
    4. Bode, M. F. 2010, Astron. Nachr., 331, 160
    5. Bode, M. F., & Evans A., 2008, Classical Novae, (2nd ed.; Cambridge: Cambridge Univ. Press), 26
    6. Beardmore, A. P., et al., 2010, ATel, 2423
    7. Carroll B. W., & Ostlie D. A., 2007, An Introduction to Modern Astrophysics, (2nd edition, San Francisco: Addison Wesley), 662, 673
    8. Cox, A. N., 2000, Allen’s Astrophysical Quantities, ed. Cox, Arthur N. (4th ed.; AIP Press, Spinger, New York)
    9. Dyck, M., Benson, J. A., Van Belle, G. T., & Ridgway, S. T., 1996, AJ, 111, 1705
    10. Hounsell, R., et al., 2010, ApJ, 724, 480
    11. Itagaki, K. 2009, CBET, 2050
    12. Kholopov, P. N., 1985, in Classical Novae, ed. M. F. Bode & A Evans (2nd ed.; Cambridge: Cambridge Univ. Press), 9
    13. Kato M., & Hachisu I., 1989, ApJ, 346, 424
    14. Mardin, P., 2001, Encyclopedia of Astronomy & Astrophysics, (4th ed.; UK: IOP Publishing)
    15. Orio M., Covington J., & Ogelman H., 2001, A&A, 373, 542
    16. Osaki. Y., 1974, PASJ, 26, 429
    17. O’Brien T. J., et al., 2010, ATel, 2434
    18. Payne-Gaposchkin C., 1957, The Galactic Novae (Amsterdam: North-Holland)
    19. Paczynski, B., 1971, ARAA, 9, 183
    20. Ragan E., et al., 2009, ATel, 2327
    21. Scargle, J. D. 1982, ApJ, 263, 835
    22. Schaefer B. E., 2005, ApJ, 621, 53
    23. Schaefer B. E., 2009, ApJ, 697, 721
    24. Yamaoka, H., et al., 2009, IAU Circ., 9098, 1

    QR CODE
    :::