Magnetized Mergers of Black Holes and Neutron Stars with LES and Neutrino Transport

黑洞和中子星的磁化合并与 LES 和中微子传输

• 批准号: 2308861
• 负责人: Steven Liebling
• 金额: $ 6万
• 依托单位: Long Island University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-06-15 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2308861&HistoricalAwards=false
• 关键词: Magnetized; Mergers; Black; Holes; Neutron

We have entered a very exciting time in high energy astrophysics with observations accumulating very quickly from a range of observatories including gravitational waves (GW) from the LIGO-Virgo-KAGRA collaboration, pulsar X-rays from NICER, supermassive black hole images from the Event Horizon Telescope, and fast radio burst observations from CHIME, and many others. This tremendous success is spurring the development of future GW observatories, such as LISA, the Einstein Telescope, and the Cosmic Explorer, in addition to new electromagnetic telescopes. And it is in this context that numerical work helps guide and extract the science. These efforts may help elucidate details about the source of r-process elements and the conditions needed for a kilonova. These studies of the magnetic structure with advanced Large Eddy Simulation (LES) and with neutrino heating and cooling in binary mergers will help develop a better understanding of the engine behind short gamma-ray bursts (sGRB). Training in and development of numerical methods of the type provided through this award is becoming more and more important in an increasing variety of fields.This project seeks to push forward the multi-messenger science achieved by studying binary neutron star and black hole--neutron star mergers: (i) continued development of the open-source MHDUET code, a general relativistic, magnetohydrodynamics(GRMHD) code, (ii) test the group's implementation of an M1 neutrino transport scheme with hot neutron stars and binary neutron star mergers, and then progress to a hybrid scheme, and (iii) study the merger and post-merger signals and outflows from binary neutron star mergers with magnetic field with large eddy simulation techniques, realistic equations of state, neutrino heating and cooling.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.

我们已经进入了高能天体物理学的一个非常激动人心的时刻，从一系列天文台收集的观测结果非常迅速，包括LIGO-Virgo-KAGRA合作的引力波（GW），NICER的脉冲星X射线，事件视界望远镜的超大质量黑洞图像，以及CHIME的快速射电暴观测，以及许多其他观测结果。 这一巨大的成功刺激了未来GW天文台的发展，如丽莎，爱因斯坦望远镜和宇宙探索者，以及新的电磁望远镜。正是在这种背景下，数字工作有助于指导和提取科学。这些努力可能有助于阐明有关r过程元素的来源和千诺瓦所需条件的细节。 这些研究的磁结构与先进的大涡模拟（LES）和中微子加热和冷却的二进制合并将有助于开发更好地了解引擎背后的短伽玛射线暴（sGRB）。通过该奖项提供的这类数值方法的培训和开发在越来越多的领域变得越来越重要，该项目旨在推动通过研究双中子星星和黑洞-中子星星合并而实现的多信使科学：继续开发开放源码的MHDUET代码，这是一种广义相对论磁流体动力学代码，（ii）测试该研究组在热中子星和双中子星星合并中实施M1中微子输运方案的情况，然后进展到混合方案，（iii）用大涡模拟技术研究合并和合并后的信号以及双中子星星合并与磁场的流出，该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。