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arXiv 2102.08238astro-ph.HEastro-ph.SR
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亚钱德拉塞卡质量白矮星爆轰的非局部热动平衡辐射转移模拟

Non-Local Thermodynamic Equilibrium Radiative Transfer Simulations of Sub-Chandrasekhar-Mass White Dwarf Detonations

Ken J. Shen, Stéphane Blondin, Daniel Kasen, Luc Dessart, Dean M. Townsley, Samuel Boos, D. John Hillier

AI总结:

本文首次对一系列亚钱德拉塞卡质量白矮星爆轰模型开展非局部热动平衡辐射转移计算,其测光与光谱可定量匹配正常Ia型超新星的完整Phillips关系。

摘要:

Ia型超新星(SNe Ia)在光度和时间尺度上跨越很宽范围,从演化迅速的暗弱亚型到演化缓慢的亮度过高亚型。以往的理论工作大多无法用单一前身星情形匹配观测到的全部SNe Ia。在此,我们首次将非局部热动平衡辐射转移计算应用于一系列精确的亚钱德拉塞卡质量白矮星爆轰爆炸模型。所得测光和光谱与B波段极大后15天内观测到的非特殊SNe Ia范围高度一致,提供了对完整Phillips(1993)关系进行定量匹配的最早范例之一。由更大质量白矮星爆炸在极大光时刻的理论光谱推断出的中等质量元素速度高于明亮的观测SNe Ia,但这些及其他差异很可能源于我们爆炸模型的一维性质,并将通过未来对多维亚钱德拉塞卡质量白矮星爆轰进行非局部热动平衡辐射输运计算而得到改进。

英文摘要:

Type Ia supernovae (SNe Ia) span a range of luminosities and timescales, from rapidly evolving subluminous to slowly evolving overluminous subtypes. Previous theoretical work has, for the most part, been unable to match the entire breadth of observed SNe Ia with one progenitor scenario. Here, for the first time, we apply non-local thermodynamic equilibrium radiative transfer calculations to a range of accurate explosion models of sub-Chandrasekhar-mass white dwarf detonations. The resulting photometry and spectra are in excellent agreement with the range of observed non-peculiar SNe Ia through 15 d after the time of B-band maximum, yielding one of the first examples of a quantitative match to the entire Phillips (1993) relation. The intermediate-mass element velocities inferred from theoretical spectra at maximum light for the more massive white dwarf explosions are higher than those of bright observed SNe Ia, but these and other discrepancies likely stem from the one-dimensional nature of our explosion models and will be improved upon by future non-local thermodynamic equilibrium radiation transport calculations of multi-dimensional sub-Chandrasekhar-mass white dwarf detonations.

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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