Computing a Universe of Galaxies

计算星系宇宙

• 批准号: 0619881
• 负责人: Romeel Dave
• 金额: $ 9.97万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0619881&HistoricalAwards=false
• 关键词: Computing; Universe; Galaxies

Supercomputer simulations of stucture formation are an emerging toolfor understanding the physical properties that drive the formation andevolution of galaxies. The computer cluster built with this SCREMS grantwill be used to run some of the world's largest Gadget-2 hydrodynamicsimulations, incorporating our promising galactic outflow model thathas enabled, for the first time, a fully dynamical investigation of thecomplex feedback cycle connecting galaxies and the intergalactic medium.These simulations will be compared to a wide suite of multiwavelength,multi-epoch observations of galaxies and intergalactic gas, in orderto refine our models and identify missing physics. Additionally,this cluster will be used to run our advanced far-infrared radiativetransfer code called Turtlebeach, which makes observable predictions forfar-infrared emission from Gadget-2 simulations, for comparison to presentobservations and future data from Herschel and ALMA. The computingpower provided by this grant will provide a new level of capabilitiesthat will significantly improve the dynamic range of our models, likelyleading to substantial advances in our understanding of galaxy formation.These science investigations will be complemented by a closely coupledprogram to expand training in supercomputing proficiency.With ever-growing telescope power we can now detect galaxies back to whenthe universe was just a few percent of its current age. These imageshave revealed a Universe filled with galaxies coming in a wide rangeof sizes, shapes, and colors, and evolving through a myriad of physicalprocesses including gravity, shocks, radiation, and chemical synthesis.Understanding how the galaxies we see came to be is a central challengein astronomy that can now be addressed using powerful supercomputers.Supercomputer simulations evolve the universe from shortly after the BigBang until the present day, and make predictions for the galaxy populationthat can be compared to forefront observations. Successful aspectsof the model allow us to solidify our physical intuition, while areasthat disagree with observations motivate improvements and refinements.Supercomputers are required to comprehensively model the sundry physicalprocesses operating over a large range of scales in space and time.The supercomputer built using this SCREMS grant will enable some of thelargest, most sophisticated simulations ever to be done, which are sureto yield new insights into the physical processes by which galaxies cometo look the way they do. Furthermore, this supercomputer will be used torun our state-of-the-art tools for comparing these models to observations,particularly in the emerging arena of millimeter astronomy. Finally,this grant will enable the development of lesson units on supercomputing,to train the next generation of students to utilize this rapidly-advancingtechnology.

超级计算机对结构形成的模拟是理解驱动星系形成和演化的物理性质的新兴工具。 用该SCREMS建立的计算机集群可以用于运行一些世界上最大的Gadget-2流体动力学模拟，结合我们有前途的星系外流模型，首次实现了对连接星系和星系际介质的复杂反馈循环的完全动力学研究。这些模拟将与一系列广泛的多波长，多时代的星系和星系际气体观测进行比较，in order订购to refine完善our models模型and identify识别missing失踪physics物理. 此外，该集群将用于运行我们的高级远红外辐射传输代码Turtlebeach，该代码可以从Gadget-2模拟中观察到远红外发射的预测，用于与Herschel和阿尔马的当前观测和未来数据进行比较。 这项资助提供的计算能力将提供一个新的能力水平，这将大大提高我们模型的动态范围，这些科学研究将得到一个紧密结合的计划的补充，该计划将扩大超级计算能力的培训。不断增长的望远镜功率，我们现在可以检测到星系回到宇宙只是其当前年龄的百分之几。 这些图像揭示了一个充满星系的宇宙，这些星系有着各种各样的大小、形状和颜色，并通过无数的物理过程，包括引力、冲击、辐射和化学合成，不断演化。理解我们所看到的星系是如何形成的，是天文学的一个核心挑战，现在可以通过强大的超级计算机来解决。超级计算机模拟宇宙从大爆炸后不久一直演化到今天，and make predictions预测for the galaxy星系population人口that can be compared比较to frontal前线observations观察. 该模型的成功之处让我们能够巩固我们的物理直觉，而与观测不一致的地方则激发了改进和完善。超级计算机需要全面模拟在空间和时间的大范围内运行的非线性物理过程。使用SCREMS赠款建造的超级计算机将实现有史以来最大、最复杂的模拟，这肯定会产生新的洞察力的物理过程中，星系来看他们的方式。 此外，这台超级计算机将用于运行我们最先进的工具，用于将这些模型与观测结果进行比较，特别是在毫米天文学的新兴竞技场中。 最后，这笔赠款将使超级计算课程单元的开发，以培训下一代学生利用这一快速发展的技术。