RUI: Pulsar Studies of Relativistic Gravitation, the Interstellar Medium, and Radio Emission Processes

RUI：相对论引力、星际介质和无线电发射过程的脉冲星研究

• 批准号: 0406832
• 负责人: Joel Weisberg
• 金额: --
• 依托单位: Carleton College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0406832&HistoricalAwards=false
• 关键词: RUI; Pulsar; Studies; Relativistic; Gravitation

This Principle Investigator is carrying out radio pulsar investigations of relativistic gravitation, the interstellar medium, and the pulsar emission process in Australia and in the U.S. The relativistic gravitation projects include timing and profile measurements of the double neutron star pulsar B1913+16 to achieve better precision on the orbital decay rate due to gravitational radiation emission, information on the geometry of the emission beam, and a much improved proper motion which has implications for studies of the evolution and galactic population of these objects. Further precise timing of millisecond pulsars is being done in order to search for timing irregularities ascribable to low-frequency gravitational waves emitted in the early Universe or from binary supermassive black holes. Interstellar medium investigations include galactic magnetic field studies of the overall magnetic field structure in the inner and outer Galaxy. Other pulsar studies will yield additional pulsar kinematical distances essential to calibrating galactic electron density models. These provide estimates of the distance to all pulsars contributing to a variety of general pulsar population issues. Work related to the pulsar radio emission process includes single-pulse and average-pulse polarimetry and analyses. The new data will be combined with earlier work in an effort to advance our knowledge of fundamental emission and magnetospheric propagation phenomena.Broader impacts. This work promotes the scientific education and training of the Carleton College students by enabling them to do real research rather than just reading about it in textbooks. The Carleton group collaborates with colleagues in Australia, Cornell, Berkeley, and Princeton, exposing them to the latest techniques, procedures, and ideas from some of the finest investigators in the field and at some of the finest observatories in the world. The project director's teaching and public outreach activities are inspired by this work. The project strengthens Carleton's record as one of the principal undergraduate sources of future physicists and astronomers, while also educating the broader public both within and outside Carleton.

该原理研究员正在澳大利亚和美国进行相对论引力、星际介质和脉冲星发射过程的射电脉冲星研究。相对论引力项目包括双中子星脉冲星B1913+16的定时和剖面测量，以达到更高的精度关于由于引力辐射发射而导致的轨道衰减率、发射光束的几何信息以及大大改进的自行对研究这些物体的演化和银河种群的影响。正在对毫秒脉冲星进行进一步的精确计时，以便寻找由于早期宇宙或双超大质量黑洞发出的低频引力波造成的计时不规则性。 星际介质研究包括对内外星系整体磁场结构的星系磁场研究。 其他脉冲星研究将产生额外的脉冲星运动距离，这对于校准银河电子密度模型至关重要。这些提供了到所有脉冲星的距离的估计，从而导致了各种一般脉冲星数量问题。与脉冲星无线电发射过程相关的工作包括单脉冲和平均脉冲极化测量和分析。 新数据将与早期的工作相结合，以增进我们对基本发射和磁层传播现象的了解。更广泛的影响。这项工作促进了卡尔顿学院学生的科学教育和培训，使他们能够进行真正的研究，而不仅仅是在教科书中阅读。卡尔顿小组与澳大利亚、康奈尔大学、伯克利分校和普林斯顿大学的同事合作，向他们展示来自该领域一些最优秀的研究人员以及世界上一些最好的天文台的最新技术、程序和想法。 项目总监的教学和公共宣传活动都受到了这项工作的启发。 该项目巩固了卡尔顿作为未来物理学家和天文学家的主要本科来源之一的记录，同时也教育了卡尔顿内外的更广泛公众。