论文标题
木星如何在不断发展的星星周围拯救或摧毁内河
How Jupiters save or destroy inner Neptunes around evolved stars
论文作者
论文摘要
在大约6吉加的几年中，我们的太阳将演变成一个红色的巨人，最后结束了白色矮人的生命。这种出色的变态将发生在欧洲星际系统的几乎所有已知的宿主星中，因此对于最终命运至关重要。显然，最内向的行星将在巨大的阶段被吞噬和蒸发，而距离远处的行星将生存。然而，在〜1-10 au之间的行星命运尚未通过多个星际潮汐处理进行研究。我们在这里首次将多个星光相互作用，恒星进化和潮汐效应结合在一起，以研究Neptune-Jupiter行星系统的演变。我们报告说，与木星质量行星更靠近恒星的海王星质量行星的命运可能与单个海王星的命运大不相同。重力相互作用，质量损失和潮汐的同时影响可以推动行星系统朝着平均运动共振。跨越这些共振特别影响了海王星的偏心率，从而影响其命运，这可能是吞噬，与木星质量的行星碰撞，从系统中的弹射或以更大的分离生存。
In about 6 Giga years our Sun will evolve into a red giant and finally end its life as a white dwarf. This stellar metamorphosis will occur to virtually all known host stars of exo-planetary systems and is therefore crucial for their final fate. It is clear that the innermost planets will be engulfed and evaporated during the giant phase and that planets located farther out will survive. However, the destiny of planets in-between, at ~ 1 - 10 au, has not yet been investigated with a multi-planet tidal treatment. We here combine for the first time multi-planet interactions, stellar evolution, and tidal effects in an N-body code to study the evolution of a Neptune-Jupiter planetary system. We report that the fate of the Neptune-mass planet, located closer to the star than the Jupiter-mass planet, can be very different from the fate of a single Neptune. The simultaneous effects of gravitational interactions, mass loss and tides can drive the planetary system towards mean motion resonances. Crossing these resonances affects particularly the eccentricity of the Neptune and thereby also its fate, which can be engulfment, collision with the Jupiter-mass planet, ejection from the system, or survival at a larger separation.
