| ESCAPING PARTICLE FLUXES IN THE ATMOSPHERES OF CLOSE-IN EXOPLANETS. I. MODEL OF HYDROGEN | |
Guo JH(郭建恒)1,2 ; Guo, JH (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
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| 发表期刊 | ASTROPHYSICAL JOURNAL
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| 2011-06-01 | |
| 卷号 | 733期号:2 |
| DOI | 10.1088/0004-637X/733/2/98 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Hydrodynamics Planetary Systems Planets And Satellites: Atmospheres Planets And Satellites: Individual (Hd 109458b Hd 189733b) |
| 摘要 | A multi-fluid model for an atomic hydrogen-proton mixture in the upper atmosphere of an extrasolar planet is presented when the continuity and momentum equations of each component have already been solved with an energy equation. The particle-number density, temperature distribution, and structure of velocity can be found by using the model. I chose two special objects, HD 209458b and HD 189733b, for discussion and concluded that their predicted mass-loss rates are consistent with those observed. The most important physical process in coupling each component is the charge exchange, which couples atomic hydrogen tightly with protons. Most of the hydrogen escapes from hot Jupiters as protons, especially in the young star-planet system. I found that the single-fluid model can describe the escape of particles when the mass-loss rate is higher than a few times 10(9) g s(-1), while below 10(9) g s(-1) the multi-fluid model is more suitable because of the decoupling of particles. Assuming an energy limit, I found that the predicted mass-loss rates of HD 189733b are a factor of 10 larger than those calculated by my models because of a high degree of ionization. For ionized wind, which is mainly composed of protons, assuming an energy limit is no longer effective. I fitted the mass-loss rates of the ionized wind as a function of F-UV by calculating the variation of the mass-loss rates with UV fluxes. |
| 项目资助者 | National Natural Science Foundation of China [10803018] ; Chinese Academy of Sciences [08AXB31001] |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-637X |
| URL | 查看原文 |
| 归档日期 | 2011-06-13 |
| WOS记录号 | WOS:000290676100025 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | ENERGETIC NEUTRAL ATOMS ; STELLAR X-RAY ; HOT-JUPITERS ; MASS-LOSS ; GIANT PLANETS ; HD 209458B ; EXTRASOLAR PLANET ; EVOLUTION ; EVAPORATION ; PARAMETERS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5207 |
| 专题 | 恒星物理研究组 中国科学院天体结构与演化重点实验室 |
| 通讯作者 | Guo, JH (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China. |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Guo JH,Guo, JH . ESCAPING PARTICLE FLUXES IN THE ATMOSPHERES OF CLOSE-IN EXOPLANETS. I. MODEL OF HYDROGEN[J]. ASTROPHYSICAL JOURNAL,2011,733(2). |
| APA | Guo JH,&Guo, JH .(2011).ESCAPING PARTICLE FLUXES IN THE ATMOSPHERES OF CLOSE-IN EXOPLANETS. I. MODEL OF HYDROGEN.ASTROPHYSICAL JOURNAL,733(2). |
| MLA | Guo JH,et al."ESCAPING PARTICLE FLUXES IN THE ATMOSPHERES OF CLOSE-IN EXOPLANETS. I. MODEL OF HYDROGEN".ASTROPHYSICAL JOURNAL 733.2(2011). |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| ESCAPING PARTICLE FL（552KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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