相接双星能量转移过程研究  

Energy transfer in contact binaries

作　　者：吴永刚[1] 宋汉峰[1,2] 李云[1] 

机构地区：[1]贵州大学理学院,贵州贵阳550025 [2]中国科学院国家天文台.贵州大学天文联合研究中心,贵州贵阳550025

出　　处：《山东大学学报（理学版）》2012年第1期44-49,共6页Journal of Shandong University(Natural Science)

基　　金：贵州省优秀科技教育人才省长专项资金项目(黔省专合字(2007)10号);贵州大学引进高层次人才基金资助项目(I065030);贵州省教育厅自然科学研究项目(黔教科2010002号)

摘　　要：从流体力学方程出发,分析和讨论了相接双星公共包层内湍流和环流对能量转移的作用,并给出了能量转移的表达式。计算结果表明:处于相接阶段的双星系统,公共包层底部环流速度较大,可达～9×103cm/s,而湍流的速度在外部较大,可达～2.4×105cm/s。环流与湍流均是小质量相接双星能量转移两个不可或缺的重要因素。在t=1.454 8×109a,环流携带能量为ΔLcirc=0.14 L⊙,t=1.454 8×109a湍流携带能量为ΔLturb=0.72 L⊙。Energy transfer which is carried by the both circulation and turbulent motions is discussed and analyzed in this paper.The formula of the energy transfer has been derived from the hydrodynamic equations.It is found that the velocity of circulation has a high value ~9×103cm/s at the bottom of the convective envelope while the turbulence velocity can attain ~2.4×105cm/s at the outer convective envelope.Therefore,circulation and turbulence are two important physical factors for contact binaries.At t=1.454 8×109a,the energy transfer by the circulation reaches ΔLcirc=0.14 L⊙,while at t=1.454 8×109a,the energy transfer by the turbulent motion is ΔLturb=0.72 L⊙.

关 键 词：相接双星 流体力学 能量转移 

分 类 号：P142.9[天文地球—天体物理]