本文關鍵詞：脈沖星風云輻射理論研究　出處：《云南大學》2016年碩士論文　論文類型：學位論文

  更多相關文章： 脈沖星 脈沖星風云 空間分辨

【摘要】：脈沖星風云是銀河系內重要的高能輻射與高能粒子源。脈沖星不斷將能量以極端相對論粒子及磁流的形式注入到周圍星風云中,帶電粒子受終端激波作用而被加速至相對論性,并通過同步輻射、逆康普頓散射產生從射電一直到甚高能伽馬射線段的非熱輻射。盡管對脈沖星風云的研究在觀測和理論方面均取得諸多進展,但其中發(fā)生的粒子加速過程、傳播細節(jié)及輻射機制等問題尚不夠清楚。本文利用含時演化模型,研究脈沖星風云的多波段輻射特征,主要工作如下：首先,我們利用單區(qū)演化模型,研究了兩顆具有多波段觀測能譜的脈沖星風云MSH 15-52和G0.9+0.1的多波段非熱輻射特征。計算結果顯示,采用雙冪律指數(shù)截斷的注入譜,在合理參數(shù)下這兩個源的多波段輻射能譜均可得到解釋,射電及X射線輻射產生于電子的同步輻射,而高能伽馬射線通過逆康普頓散射產生。對脈沖星風云MSH 15-52,其低能段(3.0×105)的粒子具有冪律指數(shù)～1.5,而更高能段(3.0×105)的粒子具有冪律指數(shù)～2.2。對脈沖星風云G0.9+0.1,其低能段(0.2×105)的粒子具有冪律指數(shù)～1.2,而更高能段(0.2×105)的粒子具有冪律指數(shù)～2.5。其次,我們利用多區(qū)模型研究了在伽馬射線波段具有空間分辨觀測結果的源HESS J1825-137的輻射特征。觀測顯示,這個源的輻射具有距離脈沖星越遠,譜越軟的特征。結果顯示,采用譜指數(shù)～2.3的單冪律指數(shù)截斷注入譜,給出的具有空間分辨的輻射譜可以對在X射線和伽馬射線波段的觀測給予很好解釋,來自各區(qū)的X射線輻射均產生于電子同步輻射,高能伽馬射線來自于相應的逆康普頓散射。
[Abstract]:The pulsar is an important situation in the Milky Way high-energy radiation particles with energy source. The pulsar will continue to energy of relativistic particles and magnetic flux form into the star around the situation, by the end of the shock wave and the charged particles are accelerated to relativistic, and through synchrotron radiation, inverse Compton scattering has been generated from the radio the non thermal radiation of very high energy gamma ray line. Although studies on pulsar have made much progress in the observation and theory, but the particle acceleration, propagation details and emission mechanisms are still not clear. The evolution of models with time by using of multi band radiation characteristics of the pulsar wind. The main work is as follows: firstly, we use the single zone evolution model, multi band of two satellites with multi band spectral pulsar MSH 15-52 cloud and G0.9+0.1 non thermal radiation gauge features. The results showed that the injection spectrum of two truncated power-law index, under reasonable parameter of multi band radiation of the two source spectra can be explained, and the radio synchrotron radiation X ray radiation produced by electrons, and high-energy gamma rays produced by inverse Compton scattering of the pulsar. FY MSH 15-52, its low energy range (3 x 105) particles have a power-law index to 1.5, while the more high energy (3 x 105) particles with the power-law index ~ 2.2. of pulsar FY G0.9+0.1, the low energy (0.2 x 105) particles have a power-law index to 1.2, while the more high energy (0.2 x 105). The particle has a power-law index ~ 2.5. secondly, we use the multi zone model of radiation characteristic of spatial resolution observations of the source HESS J1825-137 in the gamma ray. The observation shows that the radiation source is from the pulsar farther, more soft spectrum. The results showed that the spectrum of Single power-law index truncation ~ 2.3 injection with radiation spectrum, spatial resolution spectrum can give a good explanation to the observation in X ray and gamma ray are given, the X radiation from the districts are produced in the electron synchrotron radiation, high-energy gamma rays from inverse Compton scattering accordingly.

【學位授予單位】：云南大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：P145.6

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