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arXiv 1107.2886gr-qc
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从扩展的先锋10和11多普勒数据集支持先锋异常随时间变化的行为

Support for temporally varying behavior of the Pioneer anomaly from the extended Pioneer 10 and 11 Doppler data sets

Slava G. Turyshev, Viktor T. Toth, Jordan Ellis, Craig B. Markwardt

摘要:

先驱者异常是在先驱者10号和11号航天器的轨道分析中发现的一个小的向阳异常加速度。作为对影响调查的一部分,已经完成了对最近恢复的两个航天器的多普勒数据的分析。一个小的异常加速度的存在被确认使用的数据跨度超过两倍长的那些先前分析。我们检查了先锋异常的恒定性和方向,并得出结论:i)数据有利于时间衰减的异常加速度(~2 \times 10^{-11} m/s^2/yr),与恒定加速度模型相比,残差改善超过10%; ii)尽管加速度的方向仍然不精确地确定,我们没有发现支持指向太阳的方向超过指向地球的方向或沿着自旋轴方向的支持,iii)在土星先驱者11号之前的跟踪数据中,对加速早期“开始”的支持仍然很弱。我们提出了这些新的发现,并讨论其影响的性质的先锋异常。

英文摘要:

The Pioneer anomaly is a small sunward anomalous acceleration found in the trajectory analysis of the Pioneer 10 and 11 spacecraft. As part of the investigation of the effect, analysis of recently recovered Doppler data for both spacecraft has been completed. The presence of a small anomalous acceleration is confirmed using data spans more than twice as long as those that were previously analyzed. We examine the constancy and direction of the Pioneer anomaly, and conclude that: i) the data favor a temporally decaying anomalous acceleration (~2\times 10^{-11} m/s^2/yr) with an over 10% improvement in the residuals compared to a constant acceleration model; ii) although the direction of the acceleration remains imprecisely determined, we find no support in favor of a Sun-pointing direction over the Earth-pointing or along the spin-axis directions, and iii) support for an early "onset" of the acceleration remains weak in the pre-Saturn Pioneer 11 tracking data. We present these new findings and discuss their implications for the nature of the Pioneer anomaly.

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