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arXiv 1508.01355astro-ph.HE
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PWN G54 .1+0.3中的前身超新星、脉冲星风和中子星的性质

The Properties of the Progenitor Supernova, Pulsar Wind, and Neutron Star inside PWN G54.1+0.3

Joseph D. Gelfand, Patrick O. Slane, Tea Temim

摘要:

超新星遗迹(SNR)中脉冲星风星云(PWN)的演化对中心中子星、脉冲星风、前身超新星和星际介质的性质非常敏感。这些性质既难以直接测量,又对理解中子星的形成及其与周围介质的相互作用至关重要。在本文中,我们确定这些性质的PWN G54.1+0.3通过拟合其观察到的性能与模型的动力学和辐射演化的PWN内的SNR。我们的模型表明,G54.1+0.3的前身是一颗孤立的~15-20太阳质量的恒星,它在一个大质量的星团内爆炸,产生了一颗中子星,最初旋转周期为~30- 80毫秒。我们还发现,脉冲星的旋转能量的99.9%以上注入PWN的相对论电子和正电子的能量谱是由一个破碎的幂律很好的特点。最后,我们提出了未来的观测,既可以测试这个模型的有效性,更好地确定这个源的属性-特别是,它的距离和中心脉冲星的初始自旋周期。

英文摘要:

The evolution of a pulsar wind nebula (PWN) inside a supernova remnant (SNR) is sensitive to properties of the central neutron star, pulsar wind, progenitor supernova, and interstellar medium. These properties are both difficult to measure directly and critical for understanding the formation of neutron stars and their interaction with the surrounding medium. In this paper, we determine these properties for PWN G54.1+0.3 by fitting its observed properties with a model for the dynamical and radiative evolution of a PWN inside an SNR. Our modeling suggests that the progenitor of G54.1+0.3 was an isolated ~15-20 Solar Mass star which exploded inside a massive star cluster, creating a neutron star initially spinning with period ~30-80ms. We also find that >99.9% of the pulsar's rotational energy is injected into the PWN as relativistic electrons and positrons whose energy spectrum is well characterized by a broken power-law. Lastly, we propose future observations which can both test the validity of this model and better determine the properties of this source -- in particular, its distance and the initial spin period of the central pulsar.

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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