【摘要】 本文讨论了1979年3月5日宇宙γ射线爆发事件的光变曲线和能谱。得到:(1)爆发初始阶段(0—4秒)的能谱可用一个kT≈50KeV的热轫致辐射谱,一个等效罗仑兹因子γ=3.3的相对论性电子的轫致辐射和一条能量为430KeV的宽线来拟合;(2)脉动相的平均谱可用一个kT≈40KeV的热轫致辐射谱来拟合;(3)脉动相的光变曲线可以用一个温度正逐渐下降的辐射区域的热轫致辐射拟合。基于这些结果,本文提出了如下的唯象模型:由于某种原因,大量的物质突然向一个中子星的极区表面注入。电子的引力能通过电子的轫致辐射转化为爆发相的辐射能。质子的引力能先转化为辐射区域(以及与之相邻接区域)内的热能,然后再通过电子的热轫致辐射给出脉动相的硬X射线辐射。更多还原

【Abstract】 In this paper, we discussed the time profiles and energy spectra of cosmic γ-ray burst event on 5 March 1979. we obtained: (1)The energy spectrum in "burst phase" (<0~s.3) can be fitted by a thermal bremsstrahlung with KT～50 Kev, a bremsstrahlung of relativistic electrons with equivalent Lorentz factor γ=3.3 and a broad line at 430 Key; (2) The average spectrum in pulsating phase fits with a bremsstrahlung of thermal electrons with KT～40 Kev; (3) The time profile in pulsating phase can be fitted by bremsstrahlung radiation of the radiative region which are cooling with time. Based on these results we proposed a morphological model as follows: Because of some reason, a great deal of matter suddenly injects onto the surface at magnetic poles of a neutron star. The gravitational energy of electrons transforms into radiation in burst phase through bremsstrahlung of electrons. At first the gravitational energy of protons transforms into heat in radiative region and then the radiative region gives radiation in pulsating phase by bremsstrahlung of thermal electrons.更多还原