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研究生:曾遠鵬
研究生(外文):Un-Pang Chang
論文名稱:瞭解超新星殘骸的X射線光度與大小之關係
論文名稱(外文):Understanding the X-ray Luminosity-Size Relationship of Supernova Remnants
指導教授:朱有花
口試日期:2017-07-19
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:天文物理研究所
學門:自然科學學門
學類:天文及太空科學學類
論文種類:學術論文
論文出版年:2017
畢業學年度:105
語文別:英文
論文頁數:46
中文關鍵詞:核塌縮超新星殘骸大麥哲倫星雲周邊密度X射線光度Hα發射
外文關鍵詞:core-collapse supernova remnantsLarge Magellanic Cloudambient densityX-ray luminosityHα emission
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關於大麥哲倫星雲(LMC)中的超新星殘骸(SNRs)的最近研究顯示,X射線光度與殘骸大小之間,存在有趣的關係。大小相近的核塌縮(CC)超新星殘骸會有截然不同的光度。我們想瞭解箇中原因。故此,我們提出假說:高X射線發射產生在高密度地帶,而低發射則在低密度處。X射線與Hα發射率皆為氣體的溫度與密度函數,但它們的函數形式並不相同。我們使用X射線與Hα表面亮度去考察殘骸的物理環境,並探究X射線光度與大小關係的原由。
Recent study about the supernova remnants (SNRs) in the Large Magellanic Cloud (LMC) shows that there is an interesting relationship between the X-ray luminosity and the size of the SNRs. Core-collapse (CC) SNRs of similar sizes may have distinct magnitudes of luminosity. We want to figure out the reason. Thus, we speculate that high X-ray emission is produced in a high ambient density, whereas low X-ray emission in a low one. Both X-ray and Hα emissivities are functions of temperature and density of the emitting gas, but the functions of form are different. We use X-ray and Hα surface brightnesses to examine the physical conditions of the SNRs and investigate the origin of the X-ray luminosity and size relationship.
口試委員會審定書 ...i
誌謝 ...ii
中文摘要 ...iii
Abstract ...iv
Contents ...v
List of Figures ...vii
List of Tables ...ix
Chapter 1. Introduction ...1
Chapter 2. Hα and X-ray Emissions ...9
Chapter 3. Calibration between MCELS and HST Data ...11
Chapter 4. X-ray-bright SNRs ...13
Chapter 5. First Trial Plot ...24
Chapter 6. Densities from Leahy (2017) ...26
Chapter 7. Lx-ne graph and 4 discrepancies on it ...29
Chapter 8. Summary and Conclusion ...34
Reference ...36
Appendix I. Calibration between MCELS and HST Data ...37
Appendix II. SB, R, ΔR, Lpc and the rms densities ...41
Appendix III. Relative position of the HII region N159 and the SNR J0540−6944 ...45
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