论文标题
n-8799系统将在5年内使用vlti-Gravity在HR-8799系统中检测到N体型的相互作用
N-body Interactions will be Detectable in the HR-8799 System within 5 years with VLTI-GRAVITY
论文作者
论文摘要
尽管开普勒轨道是直接成像的行星的大部分天文运动，但由于n体相互作用引起的扰动使我们能够直接限制多层网系统中的系外行星质量。这有可能提高我们对大规模直接成像的行星的理解，该行星目前几乎只有依赖模型的质量。 VLTi-Gravity仪器已经证明，干涉法可以比现有方法获得100倍更好的星体精度（Gravity Collaboration等，2019），这是一种使Planet-Slanet相互作用的检测能力的水平。在这项研究中，我们表明，在HR-8799系统中，行星星空与当前使用的开普勒近似值（Lacour等，2021）的偏差预计将在五年内达到五年的四分之一，这将使它们可通过VLTi-Gravity检测到。为了进行精确的预测，该系统的建模以直接限制系外行星质量至关重要。
While Keplerian orbits account for the majority of the astrometric motion of directly-imaged planets, perturbations due to N-body interactions allow us to directly constrain exoplanet masses in multiplanet systems. This has the potential to improve our understanding of massive directly-imaged planets, which nearly all currently have only model-dependent masses. The VLTI-GRAVITY instrument has demonstrated that interferometry can achieve 100x better astrometric precision (Gravity Collaboration et al. 2019) than existing methods, a level of precision that makes detection of planet-planet interactions possible. In this study, we show that in the HR-8799 system, planet-planet deviations from currently used Keplerian approximations (Lacour et al. 2021) are expected to be up to one-quarter of a milliarc-second within five years, which will make them detectable with VLTI-GRAVITY. Modeling of this system to directly constrain exoplanet masses will be crucial in order to make precise predictions.
