Neutron Stars: Searches, Planets, Kinematics and Calibrators of Interstellar Seeing

中子星：星际视界的搜索、行星、运动学和校准器

• 批准号: 9819931
• 负责人: James Cordes
• 金额: $ 27万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-15 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9819931&HistoricalAwards=false
• 关键词: Neutron; Stars; Searches; Planets; Kinematics

ABSTRACTAST-9819931Cordes, JamesThis research is based upon a long-term search for pulsars using the Arecibo and Green Bank radio facilities. The discovery of pulsars with periods shorter than about 1.5 ms sets important constraints on the equation of state for nuclear matter and the mechanism by which rotational energy is lost. In one of several parallel efforts, radio astrometry will be conducted at the Very Large Array to determine the velocity kicks imparted to neutron stars during the supernova process. The velocity distribution so derived may provide useful information on the symmetry and energy of supernova explosions, which are standard distance indicators used in cosmological studies. A third major project will be conducted, in order to determine the distribution of ionized gas in the interstellar medium and the structure of pulsar magnetospheres using radio scintillation as a probe. These projects are expected to yield useful information on the population characteristics of neutron stars, and to identify additional planetary candidates around certain pulsars.

这项研究是基于使用阿雷西博和绿岸无线电设施对脉冲星的长期搜索。周期短于约1.5毫秒的脉冲星的发现对核物质的状态方程和旋转能量损失的机制设置了重要的限制。在几项平行工作中的一项，将在甚大阵列上进行射电天体测量，以确定超新星过程中赋予中子星的速度冲击。这样得出的速度分布可能提供有关超新星爆炸的对称性和能量的有用信息，这是宇宙学研究中使用的标准距离指示器。将开展第三个重大项目，以确定电离气体在星际介质中的分布以及使用射电闪烁作为探测器的脉冲星磁层的结构。这些项目预计将提供有关中子星群体特征的有用信息，并确定某些脉冲星周围的更多行星候选者。