论文标题
理论与观察不确定性：巨型系外行星的组成
Theoretical vs. observational uncertainties: composition of giant exoplanets
论文作者
论文摘要
为了表征巨型系外行星并更好地了解其起源，需要了解地球的组成如何取决于其质量和恒星环境。在这项工作中，我们模拟了气态行星的热演化，并探讨了各种常见模型假设（例如状态，不透明和重元分布）等各种常见模型的假设如何影响推断的半径和金属性。我们研究了理论不确定性如何转化为推断的行星半径和散装金属性中的不确定性。 虽然我们确认文献中先前报道的质量金属趋势，但是当从所有行星中删除20 $ m _ {\ oplus} $重元核心时，这种相关性消失了。我们还表明，使用更新的状态氢螺旋方程会导致更紧凑的行星。结果，我们提出了六个行星，应将其归类为膨胀的温暖木星。接下来，我们证明，包括由于金属富含辐照行星的金属构造而引起的不透明度增强，会大大改变行星半径，这可能会对推断的金属性产生巨大影响。 即使在这项工作中尚未考虑其他模型假设，我们也可以证明，计算出的理论不确定性已经可以比观察性观察者具有可比性甚至更大。因此，理论上的不确定性可能会更大。因此，我们得出的结论是，为了充分利用当前和将来的超球星数据，巨型行星的理论模型的进展至关重要。
In order to characterize giant exoplanets and better understand their origin, knowledge of how the planet's composition depends on its mass and stellar environment is required. In this work, we simulate the thermal evolution of gaseous planets and explore how various common model assumptions such as different equations of state, opacities, and heavy-element distributions affect the inferred radius and metallicity. We examine how the theoretical uncertainties translate into uncertainties in the inferred planetary radius and bulk metallicity. While we confirm the mass-metallicity trend previously reported in the literature, this correlation disappears when removing a 20 $M_{\oplus}$ heavy-element core from all the planets. We also show that using an updated hydrogen-helium equation of state leads to more compact planets. As a result, we present six planets that should be classified as inflated warm Jupiters. We next demonstrate that including the opacity-enhancement due to metal-rich envelopes of irradiated planets changes the planetary radius significantly, which can have large effects on the inferred metallicity. Even though there are other model assumptions that have not been considered in this work, we could show that the calculated theoretical uncertainties can already be comparable or even larger than the observational ones. Therefore, theoretical uncertainties are likely to be even larger. We therefore conclude that progress in theoretical models of giant planets is essential in order to take full advantage of current and future exoplanetary data.
