arXiv 0909.08242009-09-04astro-ph.IMastro-ph.EP

Construction of Coupled Period-Mass Functions in Extrasolar Planets through the Nonparametric Approach

Ing-Guey Jiang, Li-Chin Yeh, Yen-Chang Chang, Wen-Liang Hung

备注：: 20 pages, 7 figures, published in AJ, 137, 329 (2009)
发表信息：: Astron.J.137: 329-336, 2009
DOI：: 10.1088/0004-6256/137/1/329

英文摘要：

Using the period and mass data of two hundred and seventy-nine extrasolar planets, we have constructed a coupled period-mass function through the non-parametric approach. This analytic expression of the coupled period-mass function has been obtained for the first time in this field. Moreover, due to a moderate period-mass correlation, the shapes of mass/period functions vary as a function of period/mass. These results of mass and period functions give way to two important implications: (1) the deficit of massive close-in planets is confirmed, and (2) the more massive planets have larger ranges of possible semi-major axes. These interesting statistical results will provide important clues into the theories of planetary formation.

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