Light-Deflection Test of General Relativity (Physics)

夏皮罗教授的研究小组将分析1987年的一项研究的数据， 甚长基线干涉测量（VLBI）实验，以实现 在经典测试的准确性上提高了10倍， 广义相对论：光被太阳偏转。 的 1987年10月2日至14日成功记录干涉测量数据 主要由两个射电源组成：3C279 和3C273B，前者在10月被太阳遮蔽， 后者作为参考对象。 信号记录在 三个广泛分离的射频频段：2，8和23 GHz。 这样的频率覆盖范围将允许他们使用已知的 日冕中无线电波的色散关系， 电离层等离子体，以消除其大部分影响， 意见。 辅助数据将用于说明 地球方位变化的影响， 这两个来源的分布，以及地球的中性 气氛 他们希望用 103分之一的标准误差（即，确定 参数 参数化的后牛顿形式主义 （103）。

Professor Shapiro's group will analyze the data from a 1987 very-long-baseline interferometry (VLBI) experiment to achieve a tenfold improvement in the accuracy of a classical test of general relativity: the deflection of light by the Sun. The interferometric data successfully recorded on 2-14 October 1987 consist primarily of observations of two radio sources: 3C279 and 3C273B, the former occulted by the Sun on October and the latter serving as a reference object. Signals were recorded in three widely-separated radio-frequency bands: 2, 8, and 23 GHz. Such frequency coverage will allow them to use the known dispersion relation for radio waves in the coronal and ionospheric plasmas to remove most of their effects from the observations. Auxiliary data will be used to account for the effects of the variations in Earth orientation, the brightness distributions of the two sources, and the Earth's neutral atmosphere. They expect to determine the deflection with a standard error of one part in 103 (i.e., to determine the parameter of the parameterized-post-Newtonian formalism to two parts in 103).