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arXiv 0904.4053astro-ph.HEastro-ph.GA
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非辐射超新星遗迹中脉冲星风星云演化的动力学模型

A Dynamical Model for the Evolution of a Pulsar Wind Nebula inside a Non-Radiative Supernova Remnant

Joseph D. Gelfand, Patrick O. Slane, Weiqun Zhang

摘要:

超新星遗迹中的脉冲星风星云提供了一个独特的视角,可以深入了解中心中子星的性质,由其旋转能量损失提供动力的相对论风,其前身超新星以及周围环境。在本文中,我们提出了一个新的半解析模型,这样一个脉冲星风星云的演化耦合的动力学和辐射演化的脉冲星风星云,跟踪整个生命周期的超新星遗迹产生的祖先爆炸的脉冲星风星云的演化,并预测在此期间的脉冲星风星云的动力学和辐射特性。我们还讨论了这些参数的一组特定的预期的演变,并显示它再现了许多令人费解的功能,已知的年轻和年老的脉冲星风星云。该模型还预测了其演变的不同阶段的光谱特征,可通过新的无线电和伽马射线观测设施探测到。最后,这个模型的影响,以确定脉冲星风星云可以解释最近的测量宇宙射线正电子分数的PAMELA和宇宙射线轻子谱的ATIC和HESS。

英文摘要:

A pulsar wind nebula inside a supernova remnant provides a unique insight into the properties of the central neutron star, the relativistic wind powered by its loss of rotational energy, its progenitor supernova, and the surrounding environment. In this paper, we present a new semi-analytic model for the evolution of such a pulsar wind nebula which couples the dynamical and radiative evolution of the pulsar wind nebulae, traces the evolution of the pulsar wind nebulae throughout the lifetime of the supernova remnant produced by the progenitor explosion, and predicts both the dynamical and radiative properties of the pulsar wind nebula during this period. We also discuss the expected evolution for a particular set of these parameters, and show it reproduces many puzzling features of known young and old pulsar wind nebulae. The model also predicts spectral features during different phases of its evolution detectable with new radio and gamma-ray observing facilities. Finally, this model has implications for determining if pulsar wind nebulae can explain the recent measurements of the cosmic ray positron fraction by PAMELA and the cosmic ray lepton spectrum by ATIC and HESS.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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