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arXiv 1208.4946astro-ph.GAastro-ph.IM
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基于多层贝叶斯模型的3D消光映射

3D Extinction Mapping Using Hierarchical Bayesian Models

S. E. Sale

摘要:

银河系和其中的恒星形成了一个等级系统,以至于单个恒星的属性受到银河系的影响。在这里,描述了一种方法,它使用分层贝叶斯模型,同时和经验确定的平均距离消光关系的视线和恒星的属性,填充it.By利用层次性质的问题,所描述的方法是能够实现显着提高精度和准确度相对于以前的3D消光映射技术。这种方法不依赖于任何单独的调查,可以适用于任何观测,或现有观测的组合。此外,它是可扩展的,此外,可以用来研究银河系的结构,以及因素,如初始质量函数和恒星形成历史的银河系。

英文摘要:

The Galaxy and the stars in it form a hierarchical system, such that the properties of individual stars are influenced by those of the Galaxy. Here, an approach is described which uses hierarchical Bayesian models to simultaneously and empirically determine the mean distance-extinction relationship for a sightline and the properties of stars which populate it. By exploiting the hierarchical nature of the problem, the method described is able to achieve significantly improved precision and accuracy with respect to previous 3D extinction mapping techniques. This method is not tied to any individual survey and could be applied to any observations, or combination of observations available. Furthermore, it is extendible and, in addition, could be employed to study Galactic structure as well as factors such as the initial mass function and star formation history in the Galaxy.

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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