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DOI | 10.1017/S1743921311019867 |
The occurrence and the distribution of masses and radii of exoplanets | |
Marcy, Geoffrey W.; Howard, Andrew W. | |
通讯作者 | Marcy, Geoffrey W. |
会议名称 | 276th Symposium of the International-Astronomical-Union on Astrophysics of Planetary Systems: Formation, Structure, and Dynamical Evolution |
会议日期 | OCT 10-15, 2010 |
会议地点 | Torino, ITALY |
英文摘要 | We analyze the statistics of Doppler-detected planets and Kepler-detected planet candidates of high integrity. We determine the number of planets per star as a function of planet mass, radius, and orbital period, and the occurrence of planets as a function of stellar mass. We consider only orbital periods less than 50 days around Solar-type (GK) stars, for which both Doppler and Kepler offer good completeness. We account for observational detection effects to determine the actual number of planets per star. From Doppler-detected planets discovered in a survey of 166 nearby C and K main sequence stars we find a planet occurrence of 15(-4)(+5)% for planets with M sin i = 3-30 M-E and P < 50 d, as described in Howard et al. (2010). From Kepler, the planet occurrence is 0.130 +/- 0.008, 0.023 +/- 0.003, and 0.013 +/- 0.002 planets per star for planets with radii 2-4, 4-8, and 8-32 R-E, consistent with Doppler-detected planets. From Kepler, the number of planets per star as a function of planet radius is given by a. power law, d f/d log R = k(R) R-Q with k(R) = 2.9(-0.4)(+0.5), alpha = -1.92 +/- 0.11, and R = R-P / R-E. Neither the Doppler-detected planets nor the Kepler-detected planets exhibit a "desert" at super-Earth and Neptune sizes for close-in orbits, as suggested by some planet population synthesis models. The distribution of planets with orbital period, P. shows a gentle increase in occurrence with orbital period in the range 2-50 d. The occurrence of small, 2-4 R-E planets increases with decreasing stellar mass, with seven times more planets around low mass dwarfs (3600-4100 K) than around massive stars (6600-7100 K). |
英文关键词 | planetary systems: formation stars: statistics |
来源出版物 | ASTROPHYSICS OF PLANETARY SYSTEMS: FORMATION, STRUCTURE, AND DYNAMICAL EVOLUTION |
ISSN | 1743-9213 |
出版年 | 2011 |
期号 | 276 |
页码 | 3-12 |
ISBN | 978-0-521-19652-9 |
出版者 | CAMBRIDGE UNIV PRESS |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | USA |
收录类别 | CPCI-S |
WOS记录号 | WOS:000304838200001 |
WOS关键词 | EXTRASOLAR PLANETS ; SUPER-EARTHS ; SEARCH ; SCIENCE ; SYSTEM |
WOS类目 | Astronomy & Astrophysics |
WOS研究方向 | Astronomy & Astrophysics |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/299340 |
作者单位 | Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Marcy, Geoffrey W.,Howard, Andrew W.. The occurrence and the distribution of masses and radii of exoplanets[C]:CAMBRIDGE UNIV PRESS,2011:3-12. |
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