Arid
DOI10.1017/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
ISSN1743-9213
出版年2011
期号276
页码3-12
ISBN978-0-521-19652-9
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
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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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