Dusty Star-Forming Galaxies Across Cosmic Time

尘埃恒星形成星系(DSFG)在星系演化全貌中的作用目前尚不清楚。它们被怀疑是星系团中最大质量星系的始祖，也是类星体的前身，但我们仍然缺乏在整个星系演化史上对这些过程的清晰观测图景。这一博士项目将解决这一广泛领域中的几个未决问题，包括：使用Akari FIS全天巡天观测对本地和高红移DSFG进行比较，并使用PACS数据重新校准以与IRAS通量进行比较；使用光学和近红外数据对候选DSFG星系原星系团进行调查，以寻找非尘埃星系团成员。这将使用现有的数据，如Sharks调查，以及为候选原始星系团获得的新观测；这是一项对极端星暴星系的性质的研究，如果得到证实，它将是已知的最明亮的天体。这将使用来自斯巴鲁、凯克和其他地面光学和毫米/次望远镜的新数据；使用高分辨率SMA图像的SPIRE未检测到的亚毫米源来搜索非常高的红移DSFG，以提供光学/近红外对应物，从这些光学/近红外对应物中可以进行照片-z估计，并且可以获得光谱红移。一旦这些研究完成，我们将对DSFG的数量、局部和高红移以及它们在星系形成和演化的各个方面的作用有一个更好的认识。然后，可以将这些观测结果与宇宙学模拟进行比较，以确定这些模型是否与我们生活的宇宙相匹配。

The role of dusty star forming galaxies (DSFGs) in the overall picture of galaxy evolution is currently unclear. They are suspect to have roles as the progenitors of the most massive galaxies in galaxy clusters and as the precursors of quasars but we still lack a clear observational picture of these processes within the overall history of galaxy evolution. This PhD project will address several open questions in this broad area including: a comparison of local and high redshift DSFGs using the AKARI FIS all sky survey recalibrated using PACS data to allow comparison to IRAS fluxes; an investigation of candidate DSFG galaxy protoclusters using optical and NIR data to search for non-dusty cluster members. This will use both existing data, such as the SHARKS survey, and new observations obtained for the candidate prototclusters; a study of the nature of extreme starburst galaxies which, if confirmed, would be the most luminous objects known. This will use new data from Subaru, Keck and other ground based optical and mm/sub telescopes; the search for very high redshift DSFGs using SPIRE undetected submm sources using high resolution SMA images to provide optical/NIR counterparts from which photo-z estimates can be made and for which spectroscopic redshifts can be obtained. Once these studies are complete we will have a much improved view of the population of DSFGs, locally and at high redshift, and their role in various aspects of galaxy formation and evolution. These observational results can then be compared with cosmological simulations to see if the models match the universe we live in.