Efficient metal emissions in the upper atmospheres of close-in exoplanets

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摘要 Atmosphericescapeisakeyprocesscontrollingthelongtermevolutionofplanets.Radiativecoolingcompetesforenergyagainstatmosphericescapeinplanetaryupperatmospheres.Inthiswork,weuseapopulationbalancemethodandaMonteCarlomodeltocalculatethepreviouslyignoredemissionsofmetals(C,N,Oandtheirions)andcomparethemwithradiativerecombinationofHIIandLy-αemissionofHI,whicharethemostefficientcoolingmechanismscurrentlyrecognizedintheupperatmospheresofhotJupiters.TheresultsshowthattheemissionsofC,N,Oandtheirionsarestrongnon-linearfunctionsofenvironmentalparameters(temperature,density,etc.)andarelikelytobeefficientcoolingmechanismsintheupperatmospheresofclose-inexoplanets.
机构地区 不详
出版日期 2018年01月11日(中国期刊网平台首次上网日期,不代表论文的发表时间)
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