Collaborative Research: Evolution of Cosmic Structure and of the Galactic Spheroid Population

合作研究：宇宙结构和银河球体种群的演化

• 批准号: 1010033
• 负责人: Joel Primack
• 金额: $ 42.35万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1010033&HistoricalAwards=false
• 关键词: Collaborative; Research; Evolution; Cosmic; Structure

AST-1010033/1009908Primack/KlypinThe majority of the stellar mass in the Universe lies in galactic spheroids, which also host supermassive black holes (SMBH). The origin of these key structures can be clarified through the interplay of new multi-wavelength survey observations and improved theory, essential for guiding and interpreting the observations. This research focuses on the growth of cosmic structure and on the two opposing effects of early, efficient star formation, and the quenching of this process in massive dark-matter halos, which together govern the formation of blue and red galaxies. This project should discriminate between galaxy spheroid buildup by cold gas inflows and disk instabilities and the alternative of major and minor mergers. The work should also identify the roles of nuclear activity versus virial shock heating in halos above a threshold mass, distinguish satellite from central quenching, and understand the cross-talk between the shutdown of star formation and the development of spheroidal stellar components and SMBHs. Detailed models of early-type galaxy formation will be compared with observations of mergers and other processes out to high redshifts, and also of nearby galaxies whose properties can be studied in detail. The work is supported by a large program of recently completed and planned follow-on computer simulations, using the most up-to-date cosmological parameters and having high mass and spatial resolution. Additional high-resolution hydrodynamic simulations will clarify galaxy formation processes and permit the calculation of kinematics, spectra and images, including dust scattering and absorption. It is crucial that simulations are 'observed' in ways that accurately mimic observations of real galaxies.The team will involve students from underrepresented groups in astrophysical theory research, including the ability to understand the implications of the latest observations. This work pushes the computational envelope, and all codes and outputs will be available to the astrophysical community. Planned computer visualizations will help to understand the simulations while simultaneously making the results accessible to other researchers and to the public.

AST-1010033/1009908 PRIMACK/KLYPINTHE宇宙中的大部分恒星质量都在于银河球体，该球形还含有超级质量黑洞（SMBH）。 这些关键结构的起源可以通过新的多波长调查观测值和改进理论的相互作用来阐明，这对于指导和解释观察结果至关重要。 这项研究的重点是宇宙结构的生长以及早期，有效的恒星形成的两个相反作用，以及在巨大的深色 - 遗嘱中淬灭该过程，共同控制了蓝色星系的形成。 该项目应通过冷气流入和磁盘不稳定性以及主要合并的替代方案来区分星系球体的堆积。 这项工作还应确定核活动与阈值高于阈值量的光环中的作用，将卫星与中央淬火区分开，并了解恒星形成的关闭与球形恒星恒星组件和SMBH的发展之间的串扰。 早期型星系形成的详细模型将与合并和其他过程的观察结果进行比较，并将其详细研究的附近星系进行比较。 这项工作由最新的宇宙学参数以及具有高质量和空间分辨率的最新宇宙学参数，由最近完成和计划的后续计算机模拟提供了大型计划。 其他高分辨率的流体动力模拟将阐明星系形成过程，并允许计算运动学，光谱和图像，包括粉尘散射和吸收。 至关重要的是，模拟以准确模仿真实星系的方式进行“观察”。该团队将使来自代表性不足的群体的学生参与天体物理理论研究，包括了解最新观察的含义的能力。 这项工作推动了计算信封，所有代码和输出都将用于天体物理界。 计划的计算机可视化将有助于了解模拟，同时使其他研究人员和公众可以访问结果。