RUI: Radio Studies of Pulsars, Gravitation, and the Interstellar Medium

RUI：脉冲星、引力和星际介质的射电研究

• 批准号: 8919061
• 负责人: Joel Weisberg
• 金额: $ 7.22万
• 依托单位: Carleton College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-01 至 1993-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8919061&HistoricalAwards=false
• 关键词: RUI; Radio; Studies; Pulsars; Gravitation

Dr. Weisberg will carry out a research program on pulsars in three areas: (i) Studies of relativistic gravitation with the binary pulsar PSR 1913+16. The data will be used to study gravitational wave emission from the binary orbiting system, the cosmic background of ultra-long period gravitational radiation, time variation of the Newtonian gravitational constant, and geodetic spin precession. (ii) Measurements of pulsar distances and the interstellar medium. The data should yield pulsar distances, interstellar electron densities, and details of the small-scale structure of cool neutral atomic hydrogen. (iii) A pulsar timing and polarimetry survey. Approximately one hundred pulsars will be monitored quarterly to measure pulse arrival times and polarization properties of the emission. These data will be used to study pulse emission mechanisms, glitches, timing noise, slow scintillations, and free precession. Pulsars observed at radio wavelengths are among the best probes of relativistic gravitation and the diffuse interstellar medium. Analysis of pulsar signals has led to the first experimental proof of the existence of gravitational radiation, limits on the energy density of a cosmic background of gravitational radiation, and measurements of the electron density and magnetic field of the interstellar medium. Dr. Weisberg will continue his highly regarded investigations of relativistic gravitation and the interstellar medium, in addition to studying the intrinsic properties of radio wavelength emissions from pulsars. This award is made under the auspices of the Research in Undergraduate Institutions (RUI) program at the National Science Foundation.

Weisberg博士将在三个领域进行有关脉冲星的研究计划：（i）用二元脉冲星PSR 1913+16进行相对论重力的研究。 该数据将用于研究二元轨道系统，超长时期重力辐射的宇宙背景，牛顿重力常数的时间变化以及大地旋转进度的时间变化。 （ii）测量脉冲星距离和星际培养基。 数据应产生脉冲星距离，星际电子密度以及凉爽中性原子氢的小规模结构的细节。 （iii）脉冲星时和偏光仪调查。 将每季度监测大约一百个脉冲星，以测量发射的脉冲到达时间和极化特性。 这些数据将用于研究脉搏排放机制，故障，时机噪声，缓慢的闪烁和自由进动。 在无线电波长处观察到的脉冲星是相对论重力和弥漫性星际培养基的最佳探针之一。 脉冲星信号的分析导致了引力辐射存在的第一个实验证明，对引力辐射的宇宙背景的能量密度的限制以及星际介质的电子密度和磁场的测量值。 Weisberg博士将继续他对相对论重力和星际培养基的高度认可的研究，除了研究Pulsars无线电波长排放的内在特性。 该奖项是根据国家科学基金会的本科机构（RUI）计划的主持人颁发的。