Validation of the new Hipparcos reduction
Validation of the new Hipparcos reduction
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DOI：
10.1051/0004-6361:20078357
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发表时间：
2007-08
影响因子：
6.5
通讯作者：
F. V. Leeuwen
中科院分区：
文献类型：
--
作者：
F. V. Leeuwen
上下文依巴谷使命产生的天体测量数据的新缩减版已经发布，声称几乎所有亮于星等Hp = 8的恒星的准确度都比原始目录中的准确度高出4倍。目标。新的依巴谷天体测量目录检查的数据的质量和一致性的形式错误，以及可能存在的错误相关。与早期出版物的差异进行了解释。方法.内部误差是通过简化过程来跟踪的，外部误差是在与一小部分恒星的射电观测比较的基础上进行研究的，以及负视差的分布。误差相关水平的调查和减少了一个以上的因素10，在新的目录中获得的解释。结果确认了新星表中的一些形式错误。虽然不太可能存在少量额外噪音，但不能排除这种可能性。结论.依巴谷天体测量数据的新缩减使总重量比1997年出版的目录增加了2.2倍，并为关于恒星光度和局部银河系运动学的广泛研究提供了更好的数据。
Context. A new reduction of the astrometric data as produced by the Hipparcos mission has been published, claiming accuracies for nearly all stars brighter than magnitude Hp = 8 to be better, by up to a factor 4, than in the original catalog ue. Aims. The new Hipparcos astrometric catalogue is checked for the quality of the data and the consistency of the formal errors as well as the possible presence of error correlations. The differences with the earlier publication are explained. Methods. The internal errors are followed through the reduction proc ess, and the external errors are investigated on the basis of a comparison with radio observations of a small selection of stars, and the distribution of negative parallaxes. Error co rrelation levels are investigated and the reduction by more than a factor 10 as obtained in the new catalogue is explained. Results. The formal errors on the parallaxes for the new catalogue are confirmed. The presence of a small amount of additional noise , though unlikely, cannot be ruled out. Conclusions. The new reduction of the Hipparcos astrometric data provides an improvement by a factor 2.2 in the total weight compared to the catalogue published in 1997, and provides much improved data for a wide range of studies on stellar luminosities and local galactic kinematics.