The Population of Double White Dwarfs

双白矮星的数量

• 批准号: 2590534
• 金额: --
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2590534
• 关键词: Population; Double; White; Dwarfs

Double white dwarfs are a leading candidate progenitor population of thermonuclear supernovae. Understanding their role in the production of supernovae requires understanding their formation and evolution. The aim of this thesis is to do so through the observational study of double white dwarfs in our Galaxy. A combined approach will be taken using in depth photometric and spectroscopic studies of specific systems which have properties suited to accurate characterisation, such as eclipsing double white dwarfs, along with a more population focussed approach centred on the unrivalled database from the Gaia astrometric satellite. Timing studies will be pursued as a means to ultra-precise characterisation and to probe for second order effects such as mass transfer, tides and the presence of third-bodies. Population studies will focus on the use of Gaia to select potential double white dwarfs along with their later spectroscopic and photometric follow-up. Wide-field photometric archives such as the Zwicky Transient Facility and TESS will be used to test for photometric variability of the population of double white dwarfs.

双白色矮星是热核超新星的主要候选祖先。要了解它们在超新星产生中的作用，就需要了解它们的形成和演化。本论文的目的是通过对银河系中双白色矮星的观测研究来实现这一目标。将采取一种综合办法，利用对具有适合准确表征的特性的特定系统（如食双白色矮星）的深入光度和光谱研究，沿着以盖亚天体测量卫星无与伦比的数据库为中心的更注重人口的办法。计时研究将作为一种手段，以超精确的特性和探测二阶效应，如质量转移，潮汐和第三体的存在。人口研究将集中在使用盖亚选择潜在的双白色矮星沿着与他们后来的光谱和光度的后续行动。宽视场光度档案，如茨维基瞬态设施和TESS将用于测试双白色矮星人口的光度变化。