Enabling Science at the Petascale: From Binary Systems and Stellar Core Collapse To Gamma-Ray Bursts

摘要/0941653该奖项为“蓝水”项目团队和一个天体物理学研究团队之间的技术协调提供旅费，以探索在“蓝水”系统上使用天体物理学代码的准备情况。如果成功，预计该代码将用于继续合作者的研究项目，他们正在使用Cactus框架中的代码来研究(a)大质量恒星坍缩的动力学和(b)一对中子星的合并以及中子星和黑洞的合并。该提议假设前者是长波伽马射线暴的可能解释，后者可能导致短波伽马射线暴。准备数值模拟工具的计划工作包括改进天体物理代码的物理特性，包括增加中微子输运和相互作用、辐射输运、处理超相对论性流的能力、相对论性等离子体的伽马射线发射和余辉光子发射。这个项目团队包含了许多相对较新的博士学位。它计划公开开发的代码。一名博士后研究员将参与项目团队与蓝水团队的互动。项目团队中至少有一名成员来自代表性不足的群体。

ABSTRACT/0941653This award provides travel funds to support technical coordination between the Blue Waters project team and a team of astrophysical researchers to explore the readiness of an astrophysics code for use on the Blue Waters system. If successful, it is anticipated that the code will be used to continue the research programs of the collaborators who are using codes in the Cactus framework to study (a) the dynamics of the collapse of a massive star and (b) the mergers of a pair of neutron stars and of a neutron star and black hole. The proposal hypothesizes that the former is a possible explanation of long-wave gamma-ray bursts and the latter may give rise to short-wave gamma-ray bursts. Planned work preparing the numerical simulation tool involves work on improving the physics of the astrophysics code and includes adding neutrino transport and interactions, radiation transport, the capability to handle ultra-relativistic flows, gamma-ray emission from relativistic plasmas, and afterglow photon emission.The project team contains a number of relatively recent Ph.D.s. It plans to make the codes developed publicly available. One post-doctoral researcher will be involved in the interaction between the project team and the Blue Waters team. At least one member of the project team is from an under-represented group.