VLBI Astrometry

VLBI天体测量学

• 批准号: 9303527
• 负责人: Irwin Shapiro
• 金额: $ 26.08万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-11-15 至 1997-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9303527&HistoricalAwards=false
• 关键词: VLBI; Astrometry

9303527 Shapiro VLBI Astrometry. The technique of very-long-baseline-interferometry (VLBI) has been used with radio telescopes girdling the globe to determine the sky positions of compact radio sources with uncertainties of one milliarcsecond or less and the relative positions of neighboring sources with uncertainties as low as 12 microarcseconds. Dr. Shapiro and his colleagues at Harvard University will continue using this technique to: (a) determine galactic and extragalactic distances and to estimate the Hubble constant; (b) measure, or place bounds on, the proper motions of several extragalactic radio sources in order to improve our understanding of the nature of these sources and to improve the extragalactic reference frame; and (c) tie this frame to the solar-system reference frame.

小行星9303527 VLBI天体测量。 甚长基线干涉测量（VLBI）技术已与环绕地球仪的射电望远镜一起使用，以确定不确定度为1毫弧秒或更小的致密射电源的天空位置和不确定度低至12微弧秒的相邻源的相对位置。 Shapiro博士和他在哈佛大学的同事将继续利用这一技术：（a）确定银河系和河外的距离，并估计哈勃常数;（B）测量几个河外射电源的自行，或确定其界限，以增进我们对这些射电源性质的了解，并改进河外参照系;以及（c）将该坐标系与太阳系参考坐标系联系起来。