The Most Compact Regions of Relativistic Jets in Active Galactic Nuclei

活动星系核中相对论性喷流最致密的区域

• 批准号: 0907893
• 负责人: Alan Marscher
• 金额: $ 60.21万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0907893&HistoricalAwards=false
• 关键词: Most; Compact; Regions; Relativistic; Jets

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This research involves high-frequency, high-resolution radio imaging (VLBA, ALMA) of quasar jets in order to measure the Doppler beaming, Lorentz factor, and angle to the line of sight of jet flow using theoretical methods that have been developed by the investigators. Drs. Marscher and Jorstad will also measure polarization at millimeter wavelengths to try to determine whether jets are scale invariant. The main goal of the study is to provide observational tests of the prevailing theoretical model for quasar jets, involving a rotating black hole that twists magnetic fields into an outflowing helical pattern. The broader impacts include dissemination of data on the group's website, training of students (some from a minority program), a textbook on extragalactic astronomy, and public presentations.

该奖项是根据2009年《美国复苏和再投资法案》(公法111-5)提供资金的。这项研究涉及对类星体喷流进行高频、高分辨率射电成像(VLBA、ALMA)，以便使用研究人员开发的理论方法来测量多普勒波束、洛伦兹因子和与喷流视线的夹角。Marscher博士和Jorstad博士还将测量毫米波长的偏振，试图确定喷流是否具有尺度不变性。这项研究的主要目的是对类星体喷流的主流理论模型进行观测测试，该模型涉及一个旋转的黑洞，它将磁场扭曲成流出的螺旋图案。更广泛的影响包括在该组织的网站上传播数据，培训学生(其中一些来自少数族裔项目)，一本关于银河系外天文学的教科书，以及公开演讲。