Theoretical Investigations of Relativistic Jets and Extragalactic Radio Sources

相对论性喷流和河外射电源的理论研究

• 批准号: 9529175
• 负责人: Mitchell Begelman
• 金额: $ 30.26万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9529175&HistoricalAwards=false
• 关键词: Theoretical; Investigations; Relativistic; Jets; Extragalactic

AST 95-29175 PI: Mitchell Begelman Theoretical Investigations of Relativistic Jets and Extragalactic Radio Sources Clues to the nature of relativistic jets in extragalactic radio sources--to their speed, composition, and internal energy content--can be obtained by studying how they respond to disturbances. Such disturbances are provided by Nature, in the form of shocks, interactions with the ambient radiation field, and hydrodynamic instabilities. Observations, at all wavelengths from radio to gamma-rays, are now providing detailed information about the morphologies, motions, and radiative properties of these disturbances. This investigation is aimed at relating the physical character of these disturbances to their observational signatures, and determining how the interactions of jets with the gas surrounding it in an evolving cocoon affect the evolution and appearance of extragalactic radio sources. Models will be developed for particle acceleration at relativistic oblique shocks. The effects of radiation drag on the magnetic acceleration of jets, and whether the drag can trigger shocks, will be investigated.

AST 95-29175 PI：米切尔·贝格曼（Mitchell Begelman）对相对论喷射和阿加拉河外无线电来源的理论研究线索，涉及相对论射流的性质，在外层次无线电源中，速度，成分和内部能量含量 - 可以通过研究对扰动的反应来获得内部能量。这种干扰是由自然界，冲击，与环境辐射场相互作用的形式以及流体动力学不稳定性提供的。 从无线电到伽马射线的所有波长，观察结果现在都提供了有关这些干扰的形态，运动和辐射特性的详细信息。这项研究旨在将这些干扰的物理特征与它们的观察性特征联系起来，并确定喷气机与周围气体在不断发展的茧中的相互作用如何影响阿加拉河外无线电来源的演变和外观。模型将在相对论倾斜冲击下开发用于颗粒加速。辐射阻力对喷气机的磁加速度的影响，以及阻力是否可以触发冲击。