Effects of Self-gravity on Mass-loss of the Post-impact Super-Earths  

作　　者：Jiang Huang Wei Zhong Cong Yu 

机构地区：[1]School of Physics and Astronomy,Sun Yat-Sen University,Zhuhai 519082,China [2]CSST Science Center for the Guangdong-Hong Kong-Macao Greater Bay Area,Zhuhai 519082,China [3]State Key Laboratory of Lunar and Planetary Sciences,Macao University of Science and Technology,Macao,China

出　　处：《Research in Astronomy and Astrophysics》2022年第4期36-41,共6页天文和天体物理学研究（英文版）

基　　金：supported by the National Key R&D Program of China(No.2020YFC2201200);the science research grants from the China Manned Space Project(No.CMS-CSST-2021-B09 and CMS-CSST-2021-A10);opening fund of State Key Laboratory of Lunar and Planetary Sciences(Macao University of Science and Technology)(Macao FDCT Grant No.SKL-LPS(MUST)-2021-2023);supported by the National Natural Science Foundation of China(Grant Nos.11373064,11521303,11733010,and 11873103);Yunnan National Science Foundation(Grant No.Q92014HB048),and Yunnan Province(2017HC018)。

摘　　要：Kepler’s observations show most of the exoplanets are super-Earths.The formation of a super-Earth is generally related to the atmospheric mass loss that is crucial in the planetary structure and evolution.The shock driven by the giant impact will heat the planet,resulting in the atmosphere escape.We focus on whether self-gravity changes the efficiency of mass loss.Without self-gravity,if the impactor mass is comparable to the envelope mass,there is a significant mass-loss.The radiative-convective boundary will shift inward by self-gravity.As the temperature and envelope mass increase,the situation becomes more prominent,resulting in a heavier envelope.Therefore,the impactor mass will increase to motivate the significant mass loss,as the self-gravity is included.With the increase of envelope mass,the self-gravity is particularly important.

关 键 词：planets and satellites:atmospheres planets and satellites:physical evolution methods:numerical 

分 类 号：P15[天文地球—天文学]