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Disruption of a Planet Spiraling into its Host Star
Jia S(贾石)1,2,3,4; Spruit, H. C.2
通讯作者Jia, Shi(jiashi@ynao.ac.cn)
发表期刊ASTROPHYSICAL JOURNAL
2018-09-10
卷号864期号:2页码:12
DOI10.3847/1538-4357/aad77c
产权排序第1完成单位
收录类别SCI
关键词planets and satellites: general planet-star interactions planetary systems stars: general stars: interiors
摘要The processes leading to the deformation and destruction of planets spiraling into the convective envelope of their host stars are described. The planet is compressed by ram pressure and deformed into a flattened shape, for which a quantitative model is developed. Compression increases the planet's density contrast with the envelope and its gravitational binding energy. This increases the survivability, especially of gas planets. An estimate is given for the depth of disruption by ram pressure, and for the subsequent fragmentation of the remnants. We show how the debris of rocky or iron planets, instead of mixing through the convection zone (CZ), sinks below the base of the CZ. The timescale of the entire sequence of events is of the order of a few orbital times of the planet. If spiral-in of (partly) icy, rocky or iron planets has happened to the pre-main sequence Sun, then this could account for the higher opacity below the base of the CZ, as inferred from helioseismology.
资助项目MPG-CAS Joint Doctoral Promotion Program (DPP) ; Max Planck Institute for Astrophysics (MPA) ; Natural Science Foundation of China[11521303] ; Natural Science Foundation of China[11390374] ; Chinese Academy of Sciences[KJZD-EW-M06-01]
项目资助者MPG-CAS Joint Doctoral Promotion Program (DPP) ; Max Planck Institute for Astrophysics (MPA) ; Natural Science Foundation of China ; Chinese Academy of Sciences
语种英语
学科领域天文学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
ISSN0004-637X
URL查看原文
WOS记录号WOS:000444645600006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]STELLAR METALLICITY ENHANCEMENTS ; GIANT PLANETS ; MASS ; ACCRETION ; CONSUMPTION ; EXOPLANETS ; POLLUTION
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/17929
专题大样本恒星演化研究组
中国科学院天体结构与演化重点实验室
通讯作者Jia S(贾石)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
2.Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85748 Garching, Germany
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
4.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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Jia S,Spruit, H. C.. Disruption of a Planet Spiraling into its Host Star[J]. ASTROPHYSICAL JOURNAL,2018,864(2):12.
APA Jia S,&Spruit, H. C..(2018).Disruption of a Planet Spiraling into its Host Star.ASTROPHYSICAL JOURNAL,864(2),12.
MLA Jia S,et al."Disruption of a Planet Spiraling into its Host Star".ASTROPHYSICAL JOURNAL 864.2(2018):12.
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