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arXiv 0912.3449astro-ph.EP
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银河潮汐与长期轨道演化

Galactic tide and secular orbital evolution

P. Pastor, J. Klacka, L. Komar

摘要:

针对位于彗星奥尔特云中的彗星的情况,讨论了银河潮汐的运动方程。我们考虑到,银河系的潜力和质量密度取决于从银河系赤道的距离和从银河系的旋转轴的距离。轨道要素的长期演变。新的条款所产生的太阳的振荡银道面被认为是。在彗星的运动方程中加入新的项,会导致轨道演变,这可能与传统的方法有很大的不同。长期时间导数的使用仅限于彗星的轨道周期远小于i)太阳绕银河系赤道振荡的周期,以及ii)太阳绕银河系中心运动的轨道周期的情况。

英文摘要:

Equation of motion for the galactic tide is treated for the case of a comet situated in the Oort cloud of comets. We take into account that galactic potential and mass density depend on a distance from the galactic equator and on a distance from the rotational axis of the Galaxy. Secular evolution of orbital elements is presented. New terms generated by the Sun's oscillation about the galactic plane are considered. The inclusion of the new terms into the equation of motion of the comet leads to orbital evolution which may be significantly different from the conventional approach. The usage of the secular time derivatives is limited to the cases when orbital period of the comet is much less than i) the period of oscillations of the Sun around the galactic equator, and, ii) the orbital period of the motion of the Sun around the galactic center.

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。

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