用掠食包层演变抵消潮汐环流
Counteracting Tidal Circularization with the Grazing Envelope Evolution
摘要：
我们表明，大幅增强的质量损失在近星点通道，预计在掠食包络演化（GEE），可以补偿循环效应的潮汐相互作用组成的渐近巨星分支（AGB）星和主序星的双星系统。通过数值积分的运动方程，我们表明，在我们的假设下，该二进制系统可以保持其高偏心率的AGB星向后AGB阶段的演变。我们的结果可以解释一些后AGB中间双星（后AGBIBs）的高偏心率，即，轨道周期在几个月到几年之间的卫星。在GEE的框架中，维持高质量损失率的额外能量来自于巨大包层的质量吸积或其缓慢的风到更紧凑的二级恒星上。第二颗恒星通过从吸积盘发射喷流，为AGB外层的外流提供能量。
英文摘要：
We show that substantially enhanced mass loss at periastron passages, as is expected in the grazing envelope evolution (GEE), can compensate for the circularization effect of the tidal interaction in binary systems composed of an asymptotic giant branch (AGB) star and a main sequence secondary star. By numerically integrating the equations of motion we show that under our assumptions the binary system can maintain its high eccentricity as the AGB star evolves toward the post-AGB phase. Our results can explain the high eccentricity of some post-AGB intermediate binaries (post-AGBIBs), i.e., those with an orbital periods in the range of several months to few years. In the framework of the GEE, the extra energy to sustain a high mass loss rate comes from the accretion of mass from the giant envelope or its slow wind onto a more compact secondary star. The secondary star energizes the outflow from the AGB outer envelope by launching jets from the accretion disk.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
