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题名: PLANETARY POPULATION SYNTHESIS COUPLED WITH ATMOSPHERIC ESCAPE: A STATISTICAL VIEW OF EVAPORATION
作者: Jin, Sheng1, 2, 3; Mordasini, Christoph2; Parmentier, Vivien4; van Boekel, Roy2; Henning, Thomas2; Ji JiangHui(季江徽)1, 5
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2014-11-01
卷号: 795, 期号:1, 页码:65
关键词: planets and satellites: atmospheres ; planets and satellites: interiors ; planets and satellites: physical evolution
学科分类: 天文和天体物理
DOI: 10.1088/0004-637X/795/1/65
文章类型: Article
英文摘要: We apply hydrodynamic evaporation models to different synthetic planet populations that were obtained from a planet formation code based on the core-accretion paradigm. We investigated the evolution of the planet populations using several evaporation models, which are distinguished by the driving force of the escape flow (X-ray or EUV), the heating efficiency in energy-limited evaporation regimes, or both. Although the mass distribution of the planet populations is barely affected by evaporation, the radius distribution clearly shows a break at approximately 2R(circle plus). We find that evaporation can lead to a bimodal distribution of planetary sizes and to an "evaporation valley" running diagonally downward in the orbital distance-planetary radius plane, separating bare cores from low-mass planets that have kept some primordial H/He. Furthermore, this bimodal distribution is related to the initial characteristics of the planetary populations because low-mass planetary cores can only accrete small primordial H/He envelopes and their envelope masses are proportional to their core masses. We also find that the population-wide effect of evaporation is not sensitive to the heating efficiency of energy-limited description. However, in two extreme cases, namely without evaporation or with a 100% heating efficiency in an evaporation model, the final size distributions show significant differences; these two scenarios can be ruled out from the size distribution of Kepler candidates.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: EARTH-LIKE PLANETS ; SUN-LIKE STARS ; HOT JUPITERS ; SUPER-EARTHS ; GIANT PLANETS ; MASS-LOSS ; X-RAY ; EXTRASOLAR PLANETS ; HD 209458B ; IRRADIATED ATMOSPHERES
收录类别: SCI
语种: 英语
WOS记录号: WOS:000343857300065
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/11568
Appears in Collections:行星科学与深空探测实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Max Planck Inst Astron, D-69117 Heidelberg, Germany
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Nice Sophia Antipolis, CNRS, Observ Cote Azur, Lab Lagrange,UMR7293, F-06300 Nice, France
5.Chinese Acad Sci, Key Lab Planetary Sci, Nanjing 210008, Peoples R China

Recommended Citation:
Jin, Sheng; Mordasini, Christoph; Parmentier, Vivien; van Boekel, Roy; Henning, Thomas; Ji, Jianghui.PLANETARY POPULATION SYNTHESIS COUPLED WITH ATMOSPHERIC ESCAPE: A STATISTICAL VIEW OF EVAPORATION,ASTROPHYSICAL JOURNAL,2014,795(1):65
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文件名: 201402013PLANETARY POPULATION SYNTHESIS COUPLED WITH ATMOSPHERIC ESCAPE A STATISTICAL VIEW OF EVAPORATION.pdf
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