Studies of Compact Extragalactic Radio Sources

紧凑型河外射电源的研究

• 批准号: 0307531
• 负责人: David Roberts
• 金额: $ 19.43万
• 依托单位: Brandeis University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307531&HistoricalAwards=false
• 关键词: Studies; Compact; Extragalactic; Radio; Sources

AST-0307531RobertsThis project will study the physics of active galactic nuclei (AGN) as close as possible to their centers, using radio interferometry at centimeter wavelengths. Polarization observations reveal the order and orientation of the magnetic field, as well as the thermal particle environment in and around the AGN, creating "magnetic movies" of the time evolution of the jets and of critical physical parameters. Observing at two or more wavelengths will map the thermal gas in both space and time, and interpreting the combined dynamical and polarimetric data in the framework of models where shock waves propagate through jets of relativistic plasma, will constrain the physical properties of the jet and its shocks. Using space-based data to extend the observed electromagnetic spectrum, the project will measure fluid and shock velocities in a wide range of AGN, including X-ray emitting jets.This work provides an excellent environment for training students and building their research skills. The research will also create large, electronically available databases of astronomical observations, of use to other researchers in the community.***

AST-0307531 Roberts该项目将使用厘米波长的无线电干涉测量法，研究活动星系核（AGN）的物理学，尽可能靠近它们的中心。 极化观测揭示了磁场的顺序和方向，以及AGN内部和周围的热粒子环境，创造了喷流时间演化和关键物理参数的“磁电影”。 在两个或两个以上的波长观测将映射热气体在空间和时间，并解释合并的动力学和偏振数据的模型框架中，冲击波传播通过射流的相对论等离子体，将限制射流及其冲击的物理特性。 该项目将利用天基数据扩大观测到的电磁频谱，测量包括X射线喷射流在内的各种活动星系核中的流体和激波速度，这项工作为培训学生和培养他们的研究技能提供了一个极好的环境。 这项研究还将创建大型的、电子可用的天文观测数据库，供社区中的其他研究人员使用。