3-D Signatures of Thermonuclear Supernovae as Key to Probe the Explosion Physics and Progenitor Systems

热核超新星的 3D 特征是探测爆炸物理和前体系统的关键

• 批准号: 0507557
• 负责人: Peter Hoeflich
• 金额: $ 32.82万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2006-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0507557&HistoricalAwards=false
• 关键词: Signatures; Thermonuclear; Supernovae; Key; Probe

AST-0507557HoeflichThe brightness and homogeneity of thermonuclear (type 1a) supernovae (SN1a) makes them excellent distance indicators, useful to probe the cosmological equation of state or the nature of the dark energy. SN1a are also a key to the chemical evolution of our galaxy and an ideal laboratory for advanced radiation hydrodynamics, combustion theory and nuclear and atomic physics. To take full advantage of new data, detailed three dimensional (3-D) radiation and hydrodynamical models are required. Some 3-D effects seem to be unavoidable for a close binary system with mass overflow, due to the interaction with the accretion disk and the companion star, the rapid rotation of the white dwarf, the physics of the ignition process, and the properties of the nuclear burning front. The present systematic study will reveal directional luminosity asymmetries and how to correct for them. By deciphering the ejection structure, it will provide new information on the explosion physics, the progenitor star, the accretion disk, and the companion star. The consistent treatment of hydrodynamics, nucleosynthesis, and radiation transport, provides the desired link between the explosion physics and the observable quantities. Tools already created by these researchers will be further developed, and applied to calculate detailed flux and polarization spectra and aspherical light curves, whose results will be compared with extensive observations.The impact of the proposed work goes far beyond a better understanding of supernovae, including the continued development of a widely applicable hydrodynamic radiation transport code, training of students and junior researchers, and the impact on the use of supernovae as one of the main instruments of modern astronomy and cosmology.

AST-0507557HOEFLICHTHTHE热核（1A型）超新星（SN1A）的亮度和同质性使它们成为极好的距离指标，可用于探测状态的宇宙学方程或暗能量的性质。 SN1A也是我们银河系化学演化的关键，也是晚期辐射流体动力学，燃烧理论以及核和原子物理学的理想实验室。 为了充分利用新数据，需要详细的三维（3-D）辐射和流体动力学模型。 由于与积聚磁盘的相互作用和伴侣恒星的相互作用，白色矮人的快速旋转，点火过程的物理学以及核燃烧前沿的特性，对于具有质量溢出的近距离系统似乎是不可避免的。 本系统的研究将揭示定向亮度不对称以及如何为它们纠正。 通过破译射血结构，它将提供有关爆炸物理学，祖细胞，积聚磁盘和伴侣恒星的新信息。 流体动力学，核合成和辐射转运的一致治疗提供了爆炸物理学与可观察量之间的所需联系。 这些研究人员已经创建的工具将得到进一步开发，并应用于计算详细的磁通和极化光谱和非球面光曲线，其结果将与广泛的观察结果进行比较。拟议工作的影响远远超出了对超新星的更好理解，包括持续开发广泛适用的水流运输和培训仪器，以及超级训练的学生和高级研究人员的使用，这些仪器和高级研究人员的使用范围内的培训范围，这些仪器和高级研究人员培养了超级培养物，这些仪器范围内的范围内的超级启动范围越来越多，而超越了高级研究人员，这些仪器和少年的培训范围是跨越的范围。和宇宙学。