Gravitational and electromagnetic signals from compact binaries

来自致密双星的引力和电磁信号

• 批准号: 374152-2011
• 负责人: Lehner, Luis
• 金额: $ 4.15万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=572867
• 关键词: Gravitational; electromagnetic; signals; compact; binaries

Scientific knowledge has advanced as theoretical predictions are confronted with unambiguous observational data. Our understanding of some of the most exotic elements of our universe, e.g., black holes, neutron stars, supernovae gamma-ray bursts (GRBs), remains incomplete as the theoretical models for such systems are not yet mature. Soon the detection of gravitational waves from strongly gravitating/highly dynamical systems will add a new and in many cases complementary way to probe these systems. The combination of the knowledge gained in both gravitational and electromagnetic wave bands will provide an unprecedented opportunity for analyzing fascinating scenarios and will likely lead to important discoveries in astrophysics, gravity in extreme regimes and cosmology. To realize this possibility, confrontation of data with models is required. Because these systems are complex (involving several physical processes and multiple nonlinear interactions) theoretical predictions must be obtained via numerical means. Future progress relies on developing improved computational models --containing richer physics and fewer approximations-- for detailed comparisons with observational data which will further refine or even redefine our understanding of key systems. My research is directed to develop such theoretical models to predict both gravitational radiation produced by (non-vacuum) compact binary systems as well as its possible electromagnetic counterpart. Our research will aid observers in the detection enterprise and the confrontation of predictions from these and other models with observations will likely profoundly influence our understanding of fascinating systems.

随着理论预测与明确的观察数据有关，科学知识已经提高。 我们对宇宙中一些最奇特的元素的理解，例如黑洞，中子恒星，超新星伽马射线爆发（GRB）仍然不完整，因为这种系统的理论模型尚未成熟。很快，从强力引力/高度动态系统中检测引力波将增加一种新的，在许多情况下，互补的方法来探测这些系统。在引力和电磁波带中获得的知识的结合将为分析有趣的场景提供前所未有的机会，并可能导致天体物理学的重要发现，极端政权和宇宙学中的重力。 为了实现这种可能性，需要与模型对抗。因为这些系统是复杂的（涉及多个物理过程和多个非线性相互作用），必须通过数值手段获得理论预测。未来的进步依赖于开发改进的计算模型（包括富裕物理学和更少的近似值），以详细的比较观察数据，这将进一步完善甚至重新定义我们对关键系统的理解。我的研究旨在开发这种理论模型，以预测（非武器）紧凑型二元系统产生的引力辐射及其可能的电磁对应物。我们的研究将帮助观察者参与检测企业，并通过观察到这些模型和其他模型的预测对抗可能会深刻影响我们对迷人系统的理解。