Gaia Early Data Release 3: The Gaia Catalogue of Nearby Stars

Gaia Early Data Release 3: The Gaia Catalogue of Nearby Stars
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盖亚早期数据发布 3:附近恒星的盖亚目录

DOI:
10.1051/0004-6361/202039498
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发表时间:
2020-11
影响因子:
6.5
通讯作者:
Hambly NC
Hambly NC
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Smart Richard;Sarro LM;Rybizki J;Reyle C;Robin AC;Hambly NC

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目标。我们从盖亚早期数据发布3中产生了一个干净且特征良好的太阳100 pc范围内的物体目录。我们通过与完整数据发布、外部目录和模拟的比较来描述目录的特征。我们对这个样本进行了第一次科学分析,以展示其潜力和使用的最佳实践。 方法.从完整的目录中选择100 pc以内的天体,使用选定的训练集、机器学习程序、天体测量量和解决方案质量指标来确定天体测量解决方案可靠的概率。训练集的构建利用了天体测量数据、质量标志和外部测光。对于所有的候选人,我们计算距离后验概率密度使用贝叶斯程序和模拟目录定义先验。任何具有可靠的天体测量和非零概率在100 pc以内的天体都包括在目录中。 结果我们已经产生了一个目录的331 312对象,我们估计包含至少92%的恒星类型M9在100 pc的太阳。我们估计在这个目录中有9%的恒星可能位于100 pc之外,但是当使用距离概率函数时,这种污染的正确处理是可能的。我们制作了主序星、巨星和白色矮星的高信噪比光度函数。我们详细研究了毕宿星团、白色矮星群和宽双星系统,并为所有三个样本制作了候选名单。我们发现了几个流,超星系团和晕天体的局部表现,其中我们确定了盖亚土卫二的12个成员。我们提出了第一个直接的五个对象在多个系统在10 pc的太阳。 结论.我们为社区提供了太阳能社区中大量、特征鲜明的物体目录。这是一个主要的 测量和理解天文学基本参数和描述函数的基准。
Aims. We produce a clean and well-characterised catalogue of objects within 100 pc of the Sun from the Gaia Early Data Release 3. We characterise the catalogue through comparisons to the full data release, external catalogues, and simulations. We carry out a first analysis of the science that is possible with this sample to demonstrate its potential and best practices for its use. Methods. The selection of objects within 100 pc from the full catalogue used selected training sets, machine-learning procedures, astrometric quantities, and solution quality indicators to determine a probability that the astrometric solution is reliable. The training set construction exploited the astrometric data, quality flags, and external photometry. For all candidates we calculated distance posterior probability densities using Bayesian procedures and mock catalogues to define priors. Any object with reliable astrometry and a non-zero probability of being within 100 pc is included in the catalogue. Results. We have produced a catalogue of 331 312 objects that we estimate contains at least 92% of stars of stellar type M9 within 100 pc of the Sun. We estimate that 9% of the stars in this catalogue probably lie outside 100 pc, but when the distance probability function is used, a correct treatment of this contamination is possible. We produced luminosity functions with a high signal-to-noise ratio for the main-sequence stars, giants, and white dwarfs. We examined in detail the Hyades cluster, the white dwarf population, and wide-binary systems and produced candidate lists for all three samples. We detected local manifestations of several streams, superclusters, and halo objects, in which we identified 12 members of Gaia Enceladus. We present the first direct parallaxes of five objects in multiple systems within 10 pc of the Sun. Conclusions. We provide the community with a large, well-characterised catalogue of objects in the solar neighbourhood. This is a primary benchmark for measuring and understanding fundamental parameters and descriptive functions in astronomy.
DOI: --
发表时间: 2018-11
期刊: --
影响因子: --
作者:
J. Rybizki;R. Drimmel
通讯作者: J. Rybizki;R. Drimmel
DOI: --
发表时间: 1995
期刊: --
影响因子: --
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W. V. Altena;Jessica T. Lee;E. D. Hoffleit
通讯作者: W. V. Altena;Jessica T. Lee;E. D. Hoffleit
DOI: 10.1177/001258068600500106
发表时间: 1886-01
期刊: The Downside Review
影响因子: --
作者:
Rene Fletcher
通讯作者: Rene Fletcher
DOI: --
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通讯作者: C. Gini
DOI: --
发表时间: 2013-11
期刊: --
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作者:
R. Cutri;E. Wright;T. Conrow;J. Fowler;P. Eisenhardt;C. Grillmair;J. Kirkpatrick;F. Masci;
通讯作者: R. Cutri;E. Wright;T. Conrow;J. Fowler;P. Eisenhardt;C. Grillmair;J. Kirkpatrick;F. Masci;