论文标题
恒星涂抹激发相互倾斜的激发
Mutual Inclination Excitation by Stellar Oblateness
论文作者
论文摘要
Ultra-Short-Period行星（USP）为行星形成和迁移提供了重要的线索。最近，发现如果内部轨道更近（$ \ lyssim 5r _*$），并且如果行星周期比率更大（$ p_2/p_2/p_1 \ gtrsim 5 $），则行星系统的相互倾向会更大（Dai等人，2018年）。这表明USPS既经历了倾斜度激发又经历了轨道收缩。在这里，我们调查了由于出色的涂抹而引起的相互倾向的增加。我们发现，恒星的污渍（在$ \ sim 1 $ gyr之内）足以增强相互倾向，以解释观察到的签名。这表明，在由于出色的厌恶性而激发之前，USP可以在近乎共面构型中以近乎共面构造（例如，磁盘迁移+潮汐+潮汐+潮汐+潮汐+潮汐）迁移到寄主之星。
Ultra-short-period planets (USPs) provide important clues to planetary formation and migration. Recently, it is found that the mutual inclinations of the planetary systems are larger if the inner orbits are closer ($\lesssim 5R_*$) and if the planetary period ratios are larger ($P_2/P_1 \gtrsim 5$) (Dai et al. 2018). This suggests that the USPs experienced both inclination excitation and orbital shrinkage. Here we investigate the increase in the mutual inclination due to stellar oblateness. We find that the stellar oblateness (within $\sim 1$Gyr) is sufficient to enhance the mutual inclination to explain the observed signatures. This suggests that the USPs can migrate closer to the host star in a near coplanar configuration with their planetary companions (e.g., disk migration+tides or in-situ+tides), before mutual inclination gets excited due to stellar oblateness.
