High resolution multi-wavelength studies of jets in 4 Stokes parameters

4 斯托克斯参数射流的高分辨率多波长研究

• 批准号: 0607453
• 负责人: John F. Wardle
• 金额: $ 34.13万
• 依托单位: Brandeis University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0607453&HistoricalAwards=false
• 关键词: resolution; multi; wavelength; studies; jets

AST-0607453WardleThis project will use the highest resolution radio wavelength observations of the powerful jets seen to shoot out at close to the speed of light from the hearts of active galaxies, to answer fundamental questions about the jets and their central engines. All magneto-hydrodynamic models require the jets to carry enormous electric currents, which are detected via the linear and circular polarization of the radio emission. This work will measure the current in many jets, attempt to measure the true magnetic flux density in the jets, and study their interaction with their surroundings in new ways. This is one of the few projects attempting this very difficult polarization work, and it will push the ability of the Very Long Baseline Array to make circular and linear polarization observations to millimeter wavelengths. A small (undergraduate) study of the nearby microquasar SS433 may shed some light on the much larger jets in distant galaxies.Data, model fits, and movie visualizations from the previous monitoring campaign are publicly available and a useful teaching tool: these activities will be continued with the current work. Students are always involved in the research of this team, working one-on-one with faculty on projects designed to be particularly appropriate for undergraduate research. In addition, many non-science majors experience research and education through activities with this research team, and graduate with a deeper appreciation of the nature of science and of the scientific enterprise.

AST-0607453Wardle该项目将使用最高分辨率的无线电波长观测来观察从活跃星系中心以接近光速射出的强大喷流，以回答有关喷流及其中央发动机的基本问题。 所有磁流体动力学模型都需要喷射器携带巨大的电流，这些电流可以通过无线电发射的线性和圆偏振来检测。 这项工作将测量许多射流中的电流，尝试测量射流中的真实磁通密度，并以新的方式研究它们与周围环境的相互作用。 这是尝试这种非常困难的偏振工作的少数项目之一，它将推动甚长基线阵列对毫米波长进行圆偏振和线偏振观测的能力。 对附近微类星体 SS433 的小型（本科）研究可能会对遥远星系中更大的喷流有一些启发。之前监测活动的数据、模型拟合和电影可视化都是公开的，并且是一个有用的教学工具：这些活动将在当前的工作中继续进行。 学生始终参与该团队的研究，与教师一对一地合作开展特别适合本科生研究的项目。 此外，许多非科学专业的学生通过该研究团队的活动经历了研究和教育，并在毕业时对科学和科学事业的本质有了更深刻的认识。