RUI: Pulsars, Relativistic Gravitation, and the Interstellar Medium

RUI：脉冲星、相对论引力和星际介质

• 批准号: 0098540
• 负责人: Joel Weisberg
• 金额: $ 17万
• 依托单位: Carleton College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0098540&HistoricalAwards=false
• 关键词: RUI; Pulsars; Relativistic; Gravitation; Interstellar

Weisberg, JoelRUI: Pulsars, Relativistic Gravitation, and the Interstellar MediumAST-0098540In astronomy, we commonly encounter physical conditions quite unfamiliar to us here on Earth. It gives us a chance to test physical theories that apply locally in order to see if they remain valid at extremes. As neutron stars, pulsars represent one such extreme. With their many unusual properties, pulsars can be studied in themselves but they can also be used to probe the interstellar medium and to investigate experimentally the effects of relativistic gravitation. Starting from the background and results of a current grant, the investigation outlined here moves on to new research in each of these three areas. Intrinsic studies of pulsars will include measurements of polarized pulse profiles, investigations of the emission beam geometry, and searches for free and radiative precession. The binary pulsar B1913+16 will be used as a relativistic gravitational laboratory. Gravitational radiation emission and relativistic spin precession will be measured and compared with theory. The interstellar medium investigations will involve Faraday rotation measurements of the galactic magnetic field and several pulsar pulse-phase-resolved spectrometry studies. The spectrometry experiments will include the determination of pulsar distances and interstellar electron densities through neutral hydrogen kinematic distance measurements.

Weisberg、JoelRUI：脉冲星、相对论引力和星际介质AST-0098540在天文学中，我们通常会遇到地球上非常陌生的物理条件。它让我们有机会测试局部适用的物理理论，看看它们在极端情况下是否仍然有效。作为中子星，脉冲星代表了这样一个极端。脉冲星具有许多不寻常的特性，可以对其本身进行研究，但它们也可以用于探测星际介质并通过实验研究相对论引力的影响。从当前资助的背景和结果开始，本文概述的调查转向这三个领域的新研究。脉冲星的本质研究将包括偏振脉冲轮廓的测量、发射光束几何形状的研究以及自由和辐射进动的搜索。双脉冲星B1913+16将被用作相对论引力实验室。引力辐射发射和相对论自旋进动将被测量并与理论进行比较。星际介质研究将涉及银河磁场的法拉第旋转测量和一些脉冲星脉冲相位分辨光谱研究。光谱测量实验将包括通过中性氢运动距离测量来确定脉冲星距离和星际电子密度。