Ultra Wideband VLBI: Origins of Extragalactic Jets

该研究项目将使用毫米波长的甚长基线干涉测量（VLBI）技术，以前所未有的角度分辨率对附近活动星系核（agn）中流出的等离子体射流进行成像。这些观测可以直接测量频率为230GHz的喷流底部的大小，并确定其在喷流中的位置（结合低频观测的结果）。在与科学伙伴的合作下，将开发喷气基地的排放模型，以便与新的观测结果进行比较。现有的VLBI仿真软件将得到改进，以提供适当约束喷气模型参数的手段。更广泛的影响包括培训学生和博士后学者，加强仪器仪表和国际伙伴关系，以及通过教师研究经验计划让教师参与研究。

This research program will use the technique of Very Long Baseline Interferometry (VLBI) at millimeter wavelengths to image jets of outflowing plasma in nearby Active Galactic Nuclei (AGNs) at unprecedented angular resolution. These observations may directly measure the size of the base of the jet at a frequency of 230GHz and establish its location within the jet (in combination with the results of lower frequency observations). In collaboration with scientific partners, emission models of the jet base will be developed for comparison with the new observations. Existing VLBI simulation software will be enhanced to provide the means to properly constrain parameters of the jet models. Broader impacts involve training of students and postdoctoral scholars, enhancing instrumentation and international partnerships, and involvement of teachers in the research via the Research Experience for Teachers program.