Collaborative Research: WoU-MMA: Toward Binary Neutron Star Mergers on a Moving-mesh

该项目将开发一种计算代码，用于模拟中子星双星的合并。新的代码将结合流体动力学代码和数值相对论代码的效率，生成一个可以更快、更准确地预测中子星双星合并所产生的预期光学余辉的代码。这将有助于我们更多地了解宇宙中重元素的起源。该项目还将支持编写研究生和本科生的数字相对论培训材料。这项工作也将被纳入公民科学项目“BlackHoles@Home”，该项目的重点是引力波天文学。公众推广工作也将在密尔沃基大学天文馆展出。这一奖项推进了宇宙大理想之窗的目标。该项目将把移动网格流体动力学代码MANGA与有效的数值相对论代码Senr/NRPy+结合在一起。每个代码都依赖于使用适当的网格来对物理进行建模。这个项目将整合这两个程序，以允许一个移动网格的广义相对论流体动力学程序，这将是研究致密物体合并的理想选择。在开发新的代码后，该项目将把它应用于具有多变和现实状态方程的双中子星合并模型。威斯康星大学密尔沃基分校的PI将在天文馆做关于中子星和黑洞的一般性报告，并培训一小部分本科生组织和运营天文馆表演和特殊活动。西弗吉尼亚大学的PI将继续为SENR/NRPy+的Jupyter笔记本提供支持，作为一般相对论流体力学领域的学生的教学培训工具。在这个项目中对SEIR/NRPy+的任何改进都将被纳入计划中的“BlackHoles@home”公民科学项目。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

The project will develop a computational code for modeling the mergers of neutron star binaries. The new code will combine the efficiencies of a fluid dynamics code and a numerical relativity code to produce a code that can more quickly and accurately predict the expected optical afterglows from neutron star binary mergers. This will help us to learn more about the origin of heavy elements in the universe. The project will also support the development of training materials for numerical relativity at the graduate and undergraduate levels. The work will also be incorporated into the citizen-science project "BlackHoles@Home" that is focused on gravitational wave astronomy. Public outreach efforts will also be presented at the UW-Milwaukee planetarium. This award advances the goals of the Windows on the Universe Big Idea.The project will combine the moving-mesh hydrodynamics code MANGA with an efficient numerical relativity code SENR/NRPy+. Each code relies on using an appropriate grid to model the physics. This project will integrate the two codes to allow for a moving-mesh general relativistic hydrodynamics code that will be ideal for studying compact object mergers. Upon development of the new code, the project will apply it to models of binary neutron star mergers with both polytropic and realistic equations of state. The PI at UW-Milwaukee will give general presentations on neutron stars and black holes at the planetarium and train a small number of undergraduates to organize and run planetarium shows and special events. The PI at West Virginia University will continue to support the Jupyter notebooks for SENR/NRPy+ as pedagogical training tools for students in the field of general relativistic hydrodynamics. Any improvements in SENR/NRPy+ produced in this project will be incorporated in the planned "BlackHoles@home" citizen-science project.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.