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標題: | 瞭解超新星殘骸的X射線光度與大小之關係 Understanding the X-ray Luminosity-Size Relationship of Supernova Remnants |
作者: | Un-Pang Chang 曾遠鵬 |
指導教授: | 朱有花 |
關鍵字: | 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, core-collapse supernova remnants,Large Magellanic Cloud,ambient density,X-ray luminosity,Hα emission, |
出版年 : | 2017 |
學位: | 碩士 |
摘要: | 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. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/68653 |
DOI: | 10.6342/NTU201703854 |
全文授權: | 有償授權 |
顯示於系所單位: | 天文物理研究所 |
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