REVEALING A UNIVERSAL PLANET-METALLICITY CORRELATION FOR PLANETS OF DIFFERENT SOLAR-TYPE STARS

被引：129

作者：

Wang, Ji ^{[1
]}

Fischer, Debra A. ^{[1
]}

机构：

[1] Yale Univ, Dept Astron, New Haven, CT 06511 USA

来源：

ASTRONOMICAL JOURNAL | 2015年 / 149卷 / 01期

关键词：

methods: observational; methods: statistical; planetary systems; planets and satellites: fundamental parameters; techniques: photometric; PROTOPLANETARY DISK STRUCTURES; CANDIDATE HOST STARS; STELLAR MULTIPLICITY; MAIN-SEQUENCE; STATISTICAL PROPERTIES; METAL-RICH; KEPLER; MASS; EXOPLANETS; FREQUENCY;

D O I：

10.1088/0004-6256/149/1/14

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The metallicity of exoplanet systems serves as a critical diagnostic of planet formation mechanisms. Previous studies have demonstrated the planet-metallicity correlation for large planets (R-P >= 4 R-E); however, a correlation has not been found for smaller planets. With a sample of 406 Kepler objects of interest whose stellar properties are determined spectroscopically, we reveal a universal planet-metallicity correlation: not only gas-giant planets (3.9 R-E < R-P <= 22.0 R-E) but also gas-dwarf (1.7 R-E < R-P <= 3.9 R-E) and terrestrial planets (R-P <= 1.7 R-E) occur more frequently in metal-rich stars. The planet occurrence rates of gas-giant planets, gas-dwarf planets, and terrestrial planets are 9.30(+3.04)(+5.62), 2.03(-0.26)(+0.29), and 1.72(-0.17)(+0.19) times higher for metal-rich stars than for metal-poor stars, respectively.

引用

页数：7

共 54 条

[51] INFLUENCE OF STELLAR MULTIPLICITY ON PLANET FORMATION. I. EVIDENCE OF SUPPRESSED PLANET FORMATION DUE TO STELLAR COMPANIONS WITHIN 20 AU AND VALIDATION OF FOUR PLANETS FROM THE KEPLER MULTIPLE PLANET CANDIDATES [J].