Reconciling stellar and non-stellar emission in galaxy modelling

协调星系建模中的恒星和非恒星发射

• 批准号: 2436231
• 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: 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-2436231
• 关键词: Reconciling; stellar; non; emission; galaxy

The interpretation of astronomical data requires the use of galaxy models with which to interpret the incomplete observations that can be obtained of distant galaxies. These enable the physical parameters of the galaxy and its stellar population to be determined by comparison against theoretical and analytical predictions. The majority of such models focus on the stellar spectral energy distribution - the component of the emission that arises directly from the photospheres of individual stars. However some models also attempt to predict emission from other sources, such as thermal dust emission in the far-infrared and synchrotron emission in the radio powered by the magnetic acceleration of electrons in supernovae. It is rare however for the non-stellar emission components to be modelled simultaneously and self-consistently with the stellar components. The Binary Population and Spectral Synthesis (BPASS) project provides a framework for such a modelling effort, built on cutting-edge models of stellar evolution and their populations, incorporating the impact of binary star interactions. This PhD project will aim to expand upon and enhance existing BPASS models by building and calibrating models of non-stellar emission components informed by the known stellar populations in galaxies.

天文学数据的解释需要使用星系模型来解释可以获得的遥远星系的不完整观测。这些使星系的物理参数和它的恒星数量能够通过与理论和分析预测的比较来确定。大多数这样的模型集中在恒星的光谱能量分布-直接从单个恒星的光球产生的发射分量。然而，一些模型也试图预测来自其他来源的辐射，例如远红外的热尘埃辐射和由超新星中电子的磁加速提供动力的无线电中的同步辐射。然而，很少有非恒星辐射成分与恒星成分同时建模和自洽。双星星群和光谱合成项目为这种建模工作提供了一个框架，该项目建立在恒星演化及其星群的最先进模型基础上，并纳入了双星星星相互作用的影响。这个博士项目的目标是通过建立和校准由星系中已知恒星种群所告知的非恒星发射组件模型来扩展和增强现有的BPASS模型。