arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.2270astro-ph.EP
收藏

来自光度相位曲线的小行星分类特征

Asteroid taxonomic signatures from photometric phase curves

D. A. Oszkiewicz, E. Bowell, L. H. Wasserman, K. Muinonen, A. Penttilä, T. Pieniluoma, D. E. Trilling, C. A. Thomas

摘要:

我们探讨了小行星的分类和光度相位曲线之间的相关性,使用H,G12光度相位函数,用单参数G12描述的相位函数的形状。我们探讨的可用性G12在分类学分类的单个对象,小行星家族,和动态组。我们的结论是,G12的平均值所考虑的分类复合体是统计上不同的,并讨论了G12分布的整体形状为每个分类复合体。基于大约50万颗小行星的G12值,我们计算了每个小行星的C,S和X复合成员的概率。对于单个小行星,这些概率相当均匀地分布在所有复合体中,因此无法进行有意义的分类。然后,我们提出并讨论了小行星家族的G12分布,并预测了小行星家族的分类复杂的优势,G12在每个家族中的分布。对于某些小行星家族,显然可以作出分类复杂优势的概率预测。Nysa-Polana族在真元空间中显示出两个不同的区域,每个区域中具有不同的G12值。我们的结论是,G12为基础的概率分布的分类复合体通过主带同意的一般观点的C复杂的小行星比例增加的外部带。我们的结论是,G12光度参数不能用于确定单个小行星的分类复杂性,但它可以用于小行星家族和主小行星带的不同区域的统计处理。

英文摘要:

We explore the correlation between an asteroid's taxonomy and photometric phase curve using the H, G12 photometric phase function, with the shape of the phase function described by the single parameter G12. We explore the usability of G12 in taxonomic classification for individual objects, asteroid families, and dynamical groups. We conclude that the mean values of G12 for the considered taxonomic complexes are statistically different, and also discuss the overall shape of the G12 distribution for each taxonomic complex. Based on the values of G12 for about half a million asteroids, we compute the probabilities of C, S, and X complex membership for each asteroid. For an individual asteroid, these probabilities are rather evenly distributed over all of the complexes, thus preventing meaningful classification. We then present and discuss the G12 distributions for asteroid families, and predict the taxonomic complex preponderance for asteroid families given the distribution of G12 in each family. For certain asteroid families, the probabilistic prediction of taxonomic complex preponderance can clearly be made. The Nysa-Polana family shows two distinct regions in the proper element space with different G12 values dominating in each region. We conclude that the G12-based probabilistic distribution of taxonomic complexes through the main belt agrees with the general view of C complex asteroid proportion increasing towards the outer belt. We conclude that the G12 photometric parameter cannot be used in determining taxonomic complex for individual asteroids, but it can be utilized in the statistical treatment of asteroid families and different regions of the main asteroid belt.

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。

↑