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WoU-MMA: Compact Object Mergers in the Era of Multi-Messenger Astrophysics

WoU-MMA：多信使天体物理学时代的紧凑天体合并

基本信息

批准号：
1912769
负责人：
Steven Liebling
金额：
$ 4万
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：
2019
资助国家：
美国
起止时间：
2019-06-01 至 2021-11-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1912769&HistoricalAwards=false
关键词：
WoU MMA Compact Object Mergers

项目摘要

The era of gravitational wave astronomy began a few years ago with the first direct detections by the LIGO/Virgo collaboration. These detections and the accompanying understanding result from detailed knowledge of expected gravitational waveforms, and numerical evolutions are a critical ingredient in this regard. This project studies a primary source of gravitational waves for the recently upgraded LIGO detectors, namely the merger and inspiral of neutron stars. The merger of binary neutron stars is also responsible for concurrent electromagnetic signals to which conventional telescopes are sensitive, so called multi-messenger astronomy. Simulations will be carried out to study both expectations for gravitational and electromagnetic signals.Various aspects of such mergers will be studied in detail. For example, phase transitions within the neutron stars may affect expected signals during the merger. Using a piecewise-polytrope to model the equation of state with and without a phase transition, evolutions will reveal possible differences. Other effects to be studied include multiscale approximations of magnetic instabilities and axion clouds. These studies will prove helpful not only to the gravitational wave data analysis community but to the astronomical community as well. The activities described here will help further undergraduate, graduate, and postdoctoral research and STEM training, including a number of underrepresented individuals (continuing an existing record of such mentoring). Also, this work builds on open-source infrastructure and other open-source tools, and thus it helps support broadly useful, publicly released, software.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.

引力波天文学的时代开始于几年前LIGO/Virgo合作的第一次直接探测。这些探测和相应的理解来自于对预期重力波形的详细了解，而数值演变是这方面的一个关键因素。该项目为最近升级的LIGO探测器研究引力波的主要来源，即中子星的合并和螺旋。中子双星的合并也是产生电磁信号的原因，传统望远镜对这些信号很敏感，这就是所谓的多信使天文学。将进行模拟以研究引力和电磁信号的预期。将详细研究这种合并的各个方面。例如，中子星内部的相变可能会影响合并过程中的预期信号。使用分段多边形来模拟有相变和没有相变的状态方程，演化将揭示可能的差异。其他有待研究的效应包括磁不稳定性和轴子云的多尺度近似。这些研究将证明不仅对引力波数据分析界有帮助，而且对天文学界也有帮助。这里描述的活动将有助于进一步的本科生，研究生和博士后研究和STEM培训，包括一些代表性不足的个人（继续现有的此类指导记录）。此外，这项工作建立在开源基础设施和其他开源工具之上，因此有助于支持广泛有用的、公开发布的软件。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。