發(fā)布時間：2019-01-08 18:01

【摘要】：本文通過使用2002年Woosley提供的前身星模型數(shù)據(jù),用"SHII-WLYW89"程序,計算前身星為11M⊙、13M⊙、15M⊙、20M⊙、25M⊙、30M⊙、35M⊙、40M⊙的超新星,調(diào)節(jié)物態(tài)方程中參數(shù)v,探討物態(tài)方程中v對超新星星核坍縮、激波傳播及爆發(fā)能量的影響,這將為物態(tài)方程的改進提供依據(jù)。 研究結(jié)果表明：1.在星核坍縮階段,v越大,YLc、Yec、Yvc的值保持不變,但中心的熵卻減小,pmaxc值也越小,即物態(tài)方程越軟；2.在反彈過程中,v值越大,EvH也逐漸增大,即中微子攜帶走的能量也越大。但是同模區(qū)內(nèi)的物質(zhì)動能、內(nèi)能、引力勢能的總結(jié)合能(從t4到t11期間內(nèi)核轉(zhuǎn)移到外核的能量),隨著v增大而先增大后減小。比較而言,對于不同質(zhì)量的前身星,內(nèi)星核轉(zhuǎn)移到外星核的能量最大值時的v值不相同。3.在四粒子模型下考察v的變化對不同太陽質(zhì)量模型的爆發(fā)能量影響時,我們發(fā)現(xiàn)對于太陽質(zhì)量模型不同時,最佳的超核密度壓縮參數(shù)的取值不一樣,通過對8個模型的對比,發(fā)現(xiàn)：v=2較為合適；這些結(jié)論說明v對超新星鐵核坍縮、激波傳播時刻能量轉(zhuǎn)移、爆發(fā)能量等有重要的影響。這對于超新星爆發(fā)的研究有著重要的意義。
[Abstract]:In this paper, by using the data of the predecessor star model provided by Woosley in 2002 and the program "SHII-WLYW89", we calculate the supernovae whose predecessor stars are 11m _ (?), () ~ (13) M _ (?), (15M), 20m _ (?), 25M _ (?), 30M _ (?), 35M _ (?), 40m _, and adjust the parameters v in the equation of state. The effects of v on the collapse of supernova star nucleus, the propagation of shock wave and the burst energy in the equation of state are discussed, which will provide the basis for the improvement of the equation of state. The results show that: 1. At the stage of star collapse, the value of YLc,Yec,Yvc remains unchanged with the increase of v, but the entropy of the center decreases and the value of pmaxc is smaller, that is, the equation of state is softer; 2. In the process of rebound, the higher v value, the larger the EvH, that is, the greater the energy of neutrino walking. However, the total binding energy of mass kinetic energy, internal energy and gravitational potential energy in the same mode region (the energy transferred from the core to the outer nucleus between t 4 and t 11) increases first and then decreases with the increase of v. In comparison, for different masses of precursors, the v value of the inner star's nucleus transferring to the maximum of the energy of the alien nucleus is not the same as that of the former star's. 3. 3. Under the four-particle model, when we investigate the effect of v variation on the burst energy of different solar mass models, we find that the best compression parameters of supernuclei density are different for different solar mass models. The results showed that vx2 was more suitable; These results indicate that v has an important effect on the collapse of supernova iron nuclei, energy transfer at shock wave propagation time and burst energy. This is of great significance for the study of supernova eruptions.
【學位授予單位】：廣西師范大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：P145.3

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