标题： 超级地球在演化峰态盘中环状结构的缓慢迁移形成——与类地行星形成兼容 显示英文标题

标题： Super-Earth formation with slow migration from a ring in an evolving peaked disk compatible with terrestrial planet formation

摘要： 关于太阳系类地行星径向聚集起源的问题，我们更倾向于从距离太阳约1天文单位处的固体环上通过汇聚/抑制型I迁移形成行星的模型。 另一方面，在近距离区域（轨道周期为10至100天）发现了许多超级地球和亚海王星，因此从1天文单位附近的环上形成行星可能需要一定程度的内向迁移。 实现这些不同形成场景的一种方法是使用不同的气体盘模型。 在这项研究中，我们探讨了是否可以在单一框架内实现不同的场景。 我们考虑了一种通过盘风演化并形成密度峰值的盘模型，并利用N体模拟研究行星形成和轨道演化。 质量小于地球质量的行星，即使在演化的盘中也不会向内迁移，而是停留在接近1天文单位的轨道附近，维持着较高的径向质量集中度。 另一方面，质量大于地球质量的行星从一个巨大的环上形成时，在向外迁移区域上方缓慢向内迁移。 最终，最内层的行星可以移动到大约10天轨道周期的轨道上。 模拟结果还再现了太阳系和超级地球/亚海王星系统的特征（例如，质量分布、偏心率、轨道分离）。 我们的模型预测，由近1天文单位附近的环迁移形成的地球和亚地球在近距离区域的丰度较低。 显示英文摘要

摘要： For the origin of the radially concentrated solar system's terrestrial planets, planet formation from a ring of solids at about 1 au from the Sun with convergent/suppressed type I migration is preferred. On the other hand, many super-Earths and sub-Neptunes are found in the close-in region with orbital periods of 10-100 days, so that planet formation from rings in the 1-au region would require some degree of inward migration. One way to realize these different formation scenarios is to use different gas disk models. In this study we investigate whether different scenarios can be realized within a single framework. We consider a disk model that evolves via disk winds and develops a density peak, and study planet formation and orbital evolution using N-body simulations. Planets with masses less than an Earth mass formed from a low-mass ring resembling the solar system do not migrate inward even in the evolving disk and remain near 1-au orbits, maintaining a high radial mass concentration. On the other hand, planets with masses greater than an Earth mass formed from a massive ring slowly migrate inward above the outward migration region. As a result, the innermost planet can move to an orbit of about 10 days. The simulation results also reproduce the characteristics (e.g., mass distribution, eccentricity, orbital separation) of the solar system and super-Earth/sub-Neptune systems. Our model predicts that Earths and sub-Earths formed by migration from rings at near the 1-au region are less abundant in the close-in region.