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Very Long Baseline Array Measurement of Nine Pulsar Parallaxes

机译:九个脉冲星视差的超长基线阵列测量

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We determined the distances to nine pulsars by parallax measurements using the NRAO Very Long Baseline Array, doubling the number of pulsars with accurate distance measurements. Broadband phase modeling was used to calibrate the varying dispersive effects of the ionosphere and remove the resulting phase errors from the phase-referenced VLBI data. The resulting parallaxes have a typical accuracy of 100 μas or better, yielding distance measurements as accurate as 2%. We also report new proper motion measurements of these pulsars, accurate to 400 μas yr-1 or better.
机译:我们使用NRAO超长基线阵列通过视差测量确定了到九个脉冲星的距离,通过精确的距离测量将脉冲星的数量加倍。宽带相位建模用于校准电离层的变化色散效应,并从以相位为参考的VLBI数据中消除产生的相位误差。产生的视差的典型精度为100μas或更高,产生的距离测量精度为2%。我们还报告了这些脉冲星的新的正确运动测量结果,精确到400μasyr-1或更高。

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