arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1609.03264astro-ph.HE
收藏

经历有效粒子加速的年轻核心坍缩超新星遗迹的3D模拟

3D simulations of young core-collapse supernova remnants undergoing efficient particle acceleration

Gilles Ferrand, Samar Safi-Harb

摘要:

在我们的银河系内,超新星遗迹被认为是宇宙射线的主要来源。然而,重要的问题仍然是关于强子和轻子成分的份额,以及超新星能量的一部分被引导到这些成分中。我们解决这样的问题,通过数值模拟的手段相结合的冲击波的动力学处理与粒子加速。执行3D模拟使我们能够生成热发射和非热发射的合成投影图和光谱,可以与多波长观测(无线电,X射线和伽马射线)进行比较。超新星有不同的类型,虽然它们的能量收支是相同的,但它们的残余物有不同的性质,因此可能以不同的方式对银河宇宙射线池做出贡献。我们的第一个模拟集中在热核超新星,像第谷的SNR,通常发生在一个基本上不受干扰的介质。在这里,我们提出了我们的核心坍缩超新星的三维模拟,如Cas A SNR,发生在一个更复杂的介质轴承的祖先恒星的风的印记。

英文摘要:

Within our Galaxy, supernova remnants are believed to be the major sources of cosmic rays up to the "knee". However important questions remain regarding the share of the hadronic and leptonic components, and the fraction of the supernova energy channelled into these components. We address such question by the means of numerical simulations that combine a hydrodynamic treatment of the shock wave with a kinetic treatment of particle acceleration. Performing 3D simulations allows us to produce synthetic projected maps and spectra of the thermal and non-thermal emission, that can be compared with multi-wavelength observations (in radio, X-rays, and gamma-rays). Supernovae come in different types, and although their energy budget is of the same order, their remnants have different properties, and so may contribute in different ways to the pool of Galactic cosmic-rays. Our first simulations were focused on thermonuclear supernovae, like Tycho's SNR, that usually occur in a mostly undisturbed medium. Here we present our 3D simulations of core-collapse supernovae, like the Cas A SNR, that occur in a more complex medium bearing the imprint of the wind of the progenitor star.

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。

↑