Thermal history of white dwarf pollutants

白矮星污染物的热历史

• 批准号: 2751711
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2751711
• 关键词: Thermal; history; white; dwarf; pollutants

This project aims at investigating the thermal evolution (differentiation and volatile loss) of planetesimals from formation until tidal disruption inside the Roche limit of the white dwarf, to probe the formation processes (e.g., constrain the age) of the planetary system. We simulate the evolution of the temperature profile inside primitive planetesimals experiencing no thermal processing (e.g., radiogenic decay), via advection-diffusion equation, to evaluate the parameter space of differentiation/volatile loss triggered by stellar flux and/or tidal heating. The size of the parameter space indicates whether radiogenic decay is essential for differentiation and the fraction of volatiles lost during stellar evolution.

该项目旨在研究白矮星罗氏极限内从形成到潮汐破裂的行星体的热演化(分化和挥发损失)，以探索行星系统的形成过程(例如，限制年龄)。我们通过对流-扩散方程模拟未经历热处理(如放射性衰变)的原始行星体内部温度分布的演变，以评估由恒星通量和/或潮汐加热触发的微分/挥发损失的参数空间。参数空间的大小表明了放射性衰变是否对分化是必要的，以及在恒星演化过程中丢失的挥发物的比例。