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arXiv 2203.02546astro-ph.EPastro-ph.SR
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WASP-33 b和KELT-9 b两个热点的交点岁差和潮汐演化

Nodal Precession and Tidal Evolution of Two Hot-Jupiters: WASP-33 b and KELT-9 b

Alexander P. Stephan, Ji Wang, P. Wilson Cauley, B. Scott Gaudi, Ilya Ilyin, Marshall C. Johnson, Klaus G. Strassmeier

摘要:

在倾斜轨道上绕着快速旋转恒星运行的热彗星经历了潮汐引起的节岁差,这在几年的观测中是可以测量的。热行星WASP-33 b和KELT-9 b是特别有趣的目标,因为它们是迄今为止发现的最热的行星之一,绕着相对大质量的恒星运行。在这里,我们分别分析了WASP-33 b和KELT-9 b的11年和5年的档案和新数据,以模拟和改进它们的潮汐进动参数。我们的工作证实了WASP-33 b的节点进动,并首次明确检测到KELT-9 b的进动。我们确定WASP-33和KELT-9的引力四极矩分别为$(6.3^{+1.2}_{-0.8})\times10^{-5}$和$(3.26^{+0.93}_{-0.80})\times10^{-4}$。我们估计这两颗行星的岁差周期分别为$1460^{+170}_{-130}$年和$890^{+200}_{-140}$年,它们将分别在$2090^{+17}_{-10}$ ~CE和$2074^{+12}_{-10}$ ~CE年停止凌日。此外,我们调查了这两颗行星的潮汐和轨道演化,这表明高偏心率潮汐迁移的情况是可能产生的系统架构,他们将很可能不会被他们的主机之前,他们的主序列寿命结束吞没。

英文摘要:

Hot Jupiters orbiting rapidly rotating stars on inclined orbits undergo tidally induced nodal precession measurable over several years of observations. The Hot Jupiters WASP-33 b and KELT-9 b are particularly interesting targets as they are among the hottest planets found to date, orbiting relatively massive stars. Here, we analyze archival and new data that span 11 and 5 years for WASP-33 b and KELT-9 b, respectively, in order to to model and improve upon their tidal precession parameters. Our work confirms the nodal precession for WASP-33 b and presents the first clear detection of the precession of KELT-9 b. We determine that WASP-33 and KELT-9 have gravitational quadrupole moments $(6.3^{+1.2}_{-0.8})\times10^{-5}$ and $(3.26^{+0.93}_{-0.80})\times10^{-4}$, respectively. We estimate the planets' precession periods to be $1460^{+170}_{-130}$ years and $890^{+200}_{-140}$ years, respectively, and that they will cease to transit their host stars around the years $2090^{+17}_{-10}$~CE and $2074^{+12}_{-10}$~CE, respectively. Additionally, we investigate both planets' tidal and orbital evolution, suggesting that a high-eccentricity tidal migration scenario is possible to produce both system architectures and that they will most likely not be engulfed by their hosts before the end of their main sequence lifetimes.

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