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arXiv 1002.2505astro-ph.SR
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Ia型超新星爆炸多样性的模拟

Modeling the Diversity of Type Ia Supernova Explosions

F. K. Roepke, W. Hillebrandt, D. Kasen, S. E. Woosley

摘要:

Ia型超新星(SNe Ia)是观测宇宙学的主要工具。它们的峰值光度和它们的光变曲线形状之间的关系允许推断它们的固有光度,并将它们用作距离指标。这种关系是经验性的。然而,理论上的理解是必要的,以便掌握在超新星Ia宇宙学的系统学。在这里,一个模型再现观察到的正常SNe Ia的多样性。数值实现的挑战来自于物理机制中涉及的大量尺度。在爆炸的白矮星的尺度上模拟超新星需要热核燃烧过程中所涉及的微观物理学的特定模型。这种技术进行了讨论,并提出了模拟结果。

英文摘要:

Type Ia supernovae (SNe Ia) are a prime tool in observational cosmology. A relation between their peak luminosities and the shapes of their light curves allows to infer their intrinsic luminosities and to use them as distance indicators. This relation has been established empirically. However, a theoretical understanding is necessary in order to get a handle on the systematics in SN Ia cosmology. Here, a model reproducing the observed diversity of normal SNe Ia is presented. The challenge in the numerical implementation arises from the vast range of scales involved in the physical mechanism. Simulating the supernova on scales of the exploding white dwarf requires specific models of the microphysics involved in the thermonuclear combustion process. Such techniques are discussed and results of simulations are presented.

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