Maximum-likelihood method for estimating the mass and period distributions of extrasolar planets

被引：98

作者：

Tabachnik, S ^{[1
]}

Tremaine, S ^{[1
]}

机构：

[1] Princeton Univ Observ, Princeton, NJ 08544 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2002年 / 335卷 / 01期

关键词：

planetary systems; planetary systems : formation; planetary systems : protoplanetary discs;

D O I：

10.1046/j.1365-8711.2002.05610.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the distribution of mass M and orbital period P of extrasolar planets, taking account of selection effects caused by the limited velocity precision and duration of existing surveys. We fit the data on 72 planets to a power-law distribution of the form dn = CM-alpha P-beta (dM/M)(dP/P), and find alpha = 0.11 +/- 0.10, beta = 0.27 +/- 0.06 for M less than or similar to 10 M-J, where M-J is the mass of Jupiter. The correlation coefficient between these two exponents is -0.31, indicating that uncertainties in the two distributions are coupled. We estimate that 4 per cent of solar-type stars have companions in the range 1 M-J < M < 10 M-J, 2 d P < 10 yr.

引用

页码：151 / 158

页数：8

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