The Magneto-Ionic Medium of the Milky Way Galaxy

银河系的磁离子介质

• 批准号: 1144-2012
• 负责人: Landecker, Thomas
• 金额: $ 1.46万
• 依托单位: University of Calgary
• 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=568174
• 关键词: Magneto; Ionic; Medium; Milky; Way

This is a proposal to fund graduate student research, training the next generation of Canadian radio astronomers at the scientific and technical frontier of Cosmic Magnetism. The space between the stars of the Milky Way is threaded by magnetic energy that plays a significant role in the never-ending cycle of star birth and star death. The best way to detect, measure, and visualize the invisible magnetic energy is through observations with radio telescopes because magnetic fields influence the generation and propagation of radio waves in interstellar space. The quantity that must be measured is the polarization of the incoming radio signals, a preferred orientation of the waves. The technical challenges of imaging the polarized sky have been met with the DRAO Synthesis Telescope, and with "big dish" telescopes in the Canadian Galactic Plane Survey (CGPS). CGPS data are now available for investigation of the role of magnetic fields in the Milky Way. A relatively new project, the Global Magneto-Ionic Medium Survey (GMIMS), is built around new techniques of wideband antennas and receivers, and of signal processing. Instrumentation development for GMIMS is part of this proposal. GMIMS data acquisition using some of the world's largest radio telescopes is well advanced, and data will soon be available for scientific interpretation. The technical challenges of polarization imaging with a new telescope, ASKAP, are being met by an international consortium of researchers. ASKAP uses Focal Plane Arrays, multi-pixel "radio cameras", to enhance its speed of data acquisition many-fold. This will pave the way for the Square Kilometre Array, a very ambitious international project that is exciting the attention of the world's radio astronomers. ASKAP polarization data suitable for intrepretation will likely be ready within two years.

这是一项资助研究生研究的提案，旨在培养下一代加拿大射电天文学家在宇宙磁场的科学和技术前沿。 银河系中恒星之间的空间被磁能穿过，磁能在星星诞生和星星死亡的永无止境的循环中扮演着重要的角色。探测、测量和可视化不可见磁能的最佳方法是通过射电望远镜进行观测，因为磁场会影响星际空间中无线电波的产生和传播。必须测量的量是入射无线电信号的极化，即波的优选方向。利用DRAO综合望远镜和加拿大银河平面巡天（CGPS）的“碟形”望远镜，已经解决了对偏振天空成像的技术挑战。CGPS数据现在可用于研究磁场在银河系中的作用。 一个相对较新的项目，即全球磁离子介质调查，是围绕宽带天线和接收器以及信号处理的新技术而建立的。为全球监测、信息和管理系统开发仪器是这项建议的一部分。利用世界上一些最大的射电望远镜获取全球微波成像质谱数据的工作进展顺利，不久将可提供数据用于科学解释。 一个国际研究人员联合会正在应对利用新望远镜ASKAP进行偏振成像的技术挑战。ASKAP使用焦平面阵列，多像素“无线电相机”，以提高其数据采集速度的许多倍。这将为平方公里阵列铺平道路，这是一个非常雄心勃勃的国际项目，引起了世界射电天文学家的关注。适合解释的ASKAP偏振数据可能在两年内准备好。