An investigation into the physical processes of stellar variability: from accretion outbursts to the quiet Sun or Concerning stars

对恒星变化物理过程的研究：从吸积爆发到安静的太阳或有关恒星

• 批准号: 2405884
• 金额: --
• 依托单位: UNIVERSITY OF EXETER
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2405884
• 关键词: investigation; into; physical; processes; stellar

We understand the broad outline of planet formation, in that planets form in the discs around young stars. However, important physical processes such as the viscosity in the disc and the formation of planetesimals are poorly understood. This makes it impossible to predict the outcomes of the planet-formation process, such as the distribution of planet masses and orbits. Recent work at Exeter has shown that during planet formation the disc can undergo huge outbursts, when a wave of material flows through the disc towards the star. If we can discover these outbursts in their early stages, and carry out follow-up observations they have the potential to give insights into the physics of these discs, and hence into planet formation.A new generation of sky surveys is giving us the ability to carry this work out, from GAIA (an ESA mission which is currently revolutionising stellar astronomy) to the Large Synoptic Survey Telescope (an 8-m telescope commissioning in 2021-2 with the potential to image the entire available sky every three days). But they need to be coupled to the bespoke follow-up observations and the innovative software (including machine learning techniques) which form the core of this PhD project.

我们了解行星形成的广泛轮廓，在年轻恒星周围的圆盘中形成那个行星。但是，对圆盘中的粘度和行星形成等重要的物理过程知之甚少。这使得无法预测行星形成过程的结果，例如行星质量和轨道的分布。埃克塞特（Exeter）最近的工作表明，在行星形成期间，当一波材料通过圆盘向恒星流动时，光盘可能会发生巨大的爆发。 If we can discover these outbursts in their early stages, and carry out follow-up observations they have the potential to give insights into the physics of these discs, and hence into planet formation.A new generation of sky surveys is giving us the ability to carry this work out, from GAIA (an ESA mission which is currently revolutionising stellar astronomy) to the Large Synoptic Survey Telescope (an 8-m telescope commissioning in 2021-2 with the potential每三天对整个可用的天空进行图像）。但是，它们需要与定制后续观察和创新软件（包括机器学习技术）相连，后者构成了该博士学位项目的核心。