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A Model of Short Gamma-Ray Bursts: Heated Neutron Stars in Close Binary Systems

机译:短伽玛射线暴的模型:密闭双星系统中的加热中子星

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In this paper we present a model for the short (1 s) population of gamma-ray bursts. In this model heated neutron stars in a close binary system near its last stable orbit emit a large amount of neutrinos (~1053 ergs). A fraction of these neutrinos will annihilate to form an e+e- pair plasma wind that will, in turn, expand and recombine to photons that make the gamma-ray burst. We study neutrino annihilation and show that a substantial fraction (~) of the energy deposited into e+e- pairs comes from interstar neutrinos, where each member of the neutrino pair originates from each neutron star. Thus, in addition to the annihilation of neutrinos blowing off of a single star, there is a new source of baryon-free plasma that is deposited between the stars. To model the e+e- pair plasma wind between stars, we do three-dimensional relativistic numerical hydrodynamic calculations. We find that the timescale for these bursts, deriving from the baryon-free plasma, is less than 1 s and that they will have a hot spectrum ~5 MeV. The energy in bursts is of the order of 1052 ergs.
机译:在本文中,我们提出了一个短(<1 s)伽马射线爆发种群的模型。在该模型中,受热的中子星在其最后一个稳定轨道附近的紧密双星系统中发出大量中微子(〜1053 ergs)。这些中微子中的一小部分将消失,形成e + e对等离子风,然后将其扩展并重组为光子,从而产生伽马射线爆发。我们研究了中微子的ation灭,并表明沉积到e + e-对中的能量的相当一部分(〜)来自星际中微子,其中中微子对的每个成员都来自每个中子星。因此,除了the灭单个恒星的中微子外,还存在沉积在恒星之间的无重子等离子体的新来源。为了模拟恒星之间的e + e对等离子风,我们进行了三维相对论数值流体动力计算。我们发现,这些脉冲的时间尺度源自无重子的等离子体,小于1 s,并且它们的热光谱约为5 MeV。突发能量约为1052 ergs。

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