發(fā)布時(shí)間：2018-01-03 04:09

  本文關(guān)鍵詞：脈沖星風(fēng)云輻射理論研究　出處：《云南大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 脈沖星 脈沖星風(fēng)云 空間分辨

【摘要】：脈沖星風(fēng)云是銀河系內(nèi)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(duì)論粒子及磁流的形式注入到周圍星風(fēng)云中,帶電粒子受終端激波作用而被加速至相對(duì)論性,并通過(guò)同步輻射、逆康普頓散射產(chǎn)生從射電一直到甚高能伽馬射線段的非熱輻射。盡管對(duì)脈沖星風(fēng)云的研究在觀測(cè)和理論方面均取得諸多進(jìn)展,但其中發(fā)生的粒子加速過(guò)程、傳播細(xì)節(jié)及輻射機(jī)制等問題尚不夠清楚。本文利用含時(shí)演化模型,研究脈沖星風(fēng)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(cè)能譜的脈沖星風(fēng)云MSH 15-52和G0.9+0.1的多波段非熱輻射特征。計(jì)算結(jié)果顯示,采用雙冪律指數(shù)截?cái)嗟淖⑷胱V,在合理參數(shù)下這兩個(gè)源的多波段輻射能譜均可得到解釋,射電及X射線輻射產(chǎn)生于電子的同步輻射,而高能伽馬射線通過(guò)逆康普頓散射產(chǎn)生。對(duì)脈沖星風(fēng)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(duì)脈沖星風(fēng)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(cè)結(jié)果的源HESS J1825-137的輻射特征。觀測(cè)顯示,這個(gè)源的輻射具有距離脈沖星越遠(yuǎn),譜越軟的特征。結(jié)果顯示,采用譜指數(shù)～2.3的單冪律指數(shù)截?cái)嘧⑷胱V,給出的具有空間分辨的輻射譜可以對(duì)在X射線和伽馬射線波段的觀測(cè)給予很好解釋,來(lái)自各區(qū)的X射線輻射均產(chǎn)生于電子同步輻射,高能伽馬射線來(lái)自于相應(yīng)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(xué)位授予單位】：云南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：P145.6

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本文編號(hào)：1372305