The Host Galaxies of Long-Duration Gamma-Ray Bursts as High-Redshift Cosmological Probes

作为高红移宇宙学探测器的长持续伽马射线暴的宿主星系

• 批准号: 2159969
• 金额: --
• 依托单位: Liverpool John Moores University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2159969
• 关键词: Host; Galaxies; Long; Duration; Gamma

The student will use large multi-wavelength data sets (optical, NIR, mid-IR, millimeter, radio) on a sample of gamma-ray bursts galaxies spanning z=0 to z=6 to characterize cosmic evolution and better understand the origins of gamma-ray bursts. Over the first 1-2 years the student will build spectral energy distributions using these data and fit them to theoretical models to study how the population evolves with time and examine their connection to other classes of galaxies selected in deep surveys. He will also compare host properties to afterglow-inferred properties (e.g. inferred metallicity) to study correlations between sightline properties with integrated host properties. Finally, he will employ HST data from a recently-approved Cycle 26 program to constrain the faint-end galaxy luminosity function slope at z=5 and independently test whether faint galaxies were sufficient to reionize the early universe.

该学生将在gamma-ray爆发的样本上使用大型多波长数据集（光学，NIR，MID-IR，毫米，无线电），跨越Z = 0到Z = 6，以表征宇宙进化，并更好地了解伽马射线爆发的起源。在最初的1 - 2年中，学生将使用这些数据构建光谱能量分布，并将它们适合理论模型，以研究人口如何随着时间的流逝而演变，并检查他们与在深度调查中选择的其他类别的星系的联系。他还将将宿主特性与余辉效果的特性（例如推断金属性）进行比较，以研究与集成宿主特性之间的视线特性之间的相关性。最后，他将采用来自最近批准的循环26程序中的HST数据来限制Z = 5处微弱的星系光度函数斜率，并独立测试微弱的星系是否足以使早期宇宙恢复原状。