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.

这位首席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无线电脉冲星调查。 相对论引力项目包括对双中子星星脉冲星B1913+16进行定时和剖面测量，以更精确地测量引力辐射发射造成的轨道衰减率，提供关于发射光束几何形状的信息，并大大改进自行，这对研究这些天体的演化和银河系人口有影响。为了寻找早期宇宙或超大质量双黑洞发出的低频引力波造成的时间不规则性，正在对毫秒级引力波进行更精确的计时。 星际介质研究包括对银河系内外整体磁场结构的银河系磁场研究。 其他脉冲星研究将产生额外的脉冲星运动学距离必不可少的校准银河系电子密度模型。这些提供了对所有导致各种一般脉冲星人口问题的脉冲星的距离的估计。与脉冲星射电发射过程有关的工作包括单脉冲和平均脉冲偏振测量和分析。 新的数据将与以前的工作相结合，努力提高我们对基本发射和磁层传播现象的认识。这项工作促进了卡尔顿学院学生的科学教育和培训，使他们能够做真实的研究，而不仅仅是阅读教科书。卡尔顿小组与澳大利亚、康奈尔大学、伯克利大学和普林斯顿大学的同事合作，让他们接触到该领域一些最优秀的研究人员和世界上一些最优秀的天文台的最新技术、程序和想法。 项目主任的教学和公共宣传活动受到这项工作的启发。 该项目加强了卡尔顿作为未来物理学家和天文学家的主要本科生来源之一的记录，同时也教育了卡尔顿内外的更广泛的公众。