电偶极子模型在天体光谱中的应用  

Electric dipoles and collision-induced absorption spectra in cool star atmospheres

作　　者：王菲[1] WANG Fei

机构地区：[1]北京理工大学物理学院,北京100081

出　　处：《大学物理》2019年第2期55-59,共5页College Physics

基　　金：北京理工大学第十一批教改立项(082)资助

摘　　要：与电介质中非极性分子的位移极化和极性分子的转向极化不同的是,天体致密大气层中的原子及分子间因碰撞也会产生电偶极矩,进而出现吸收过程,是研究带外行星和冷白矮星等天体光谱的重要理论基础.以冷白矮星为例,介绍其大气层中大量原子分子对之间的碰撞诱导偶极矩与电磁辐射相互作用产生的连续谱吸收.Electric dipoles are generated not only from the displacement polarization of nonpolar molecule and the turning direction polarization of polar molecule but also from the collisions between atoms and molecules in dense gas.The infrared photon is absorbed by molecule pairs formed in dense atmospheres of “cool” star and outer planet due to the interactions between collision-induced dipole moments and electromagnetic radiation.The collision-induced absorption spectra are also introduced for hydrogen dense gas in white dwarfs atmospheres.

关 键 词：碰撞诱导吸收 偶极矩 白矮星 

分 类 号：P144.1[天文地球—天体物理]