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arXiv 1306.5519astro-ph.GA
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太阳银心距测定的统计分析

Statistical analysis of the determinations of the Sun's Galactocentric distance

Zinovy Malkin

摘要:

基于在过去几十年中进行的数十次Ro测量,已经进行了几项研究以得出Ro的最佳估计。有些人只使用简单的平均值来得出结果,而另一些人则对发表的结果中可能存在的错误进行了全面的分析。在这两种情况下,均未对所用数据进行详细的统计分析。然而,计算银河系自转常数的最佳估计值不仅是一项天文学任务,也是一项艰巨的任务。在这里,我们对53个Ro测量值(在过去20年中发表)进行分析,以评估数据的一致性。我们的分析表明,它们是内在一致的。它还表明,从过去20年的Ro估计的任何趋势在统计上是可以忽略不计的,这使得存在的跟风效应值得怀疑。另一方面,在已公布的Ro估计的正式错误显着改善随着时间的推移。

英文摘要:

Based on several tens of Ro measurements made during the past decades, several studies have been performed to derive the best estimate of Ro. Some used just simple averaging to derive a result, whereas others provided comprehensive analyses of possible errors in published results. In either case, detailed statistical analyses of data used were not performed. However, a computation of the best estimates of the Galactic rotation constants is not only an astronomical but also a metrological task. Here we perform an analysis of 53 Ro measurements (published in the past 20 years) to assess the consistency of the data. Our analysis shows that they are internally consistent. It is also shown that any trend in the Ro estimates from the last 20 years is statistically negligible, which renders the presence of a bandwagon effect doubtful. On the other hand, the formal errors in the published Ro estimates improve significantly with time.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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