论文标题
柏拉图II：新功能和HD 189733B Transit和Eclipse数据的全面检索
PLATON II: New Capabilities And A Comprehensive Retrieval on HD 189733b Transit and Eclipse Data
论文作者
论文摘要
最近，我们引入了用于观察者菜鸟（Platon）的行星大气工具，该工具是一个Python封装，该软件包计算了系外行星的模型传输光谱，并根据观察到的光谱检索大气特征。现在，我们扩展了其功能，以包括计算二次日食深度的能力。我们还添加了使用相关的辐射传输方法来计算模型的选项，从而提高了准确性而无需牺牲速度。此外，我们使用最新和完整的公共行列表更新了使用旧或专有行列表生成的柏拉图的不透明性（其中许多是使用旧线或专有行列表生成的）。在0.3--30 um范围内，这些不相处以r = 1000，r = 10,000，r = 375,000的IR带附近的r = 375,000，这使得可以利用Platon进行地面基于地面的高分辨率互相关研究。为了展示Platon的新功能，我们在原型Hot Jupiter HD 189733B的出版HST和Spitzer传输和发射光谱上进行了检索。这是文献中该星球的第一个联合交通和二次蚀检索，也是迄今为止收回的最全面的运输和日食数据。 We find that these high signal-to-noise data are well-matched by atmosphere models with a C/O ratio of $0.66_{-0.09}^{+0.05}$ and a metallicity of $12_{-5}^{+8}$ times solar where the terminator is dominated by extended nanometer-sized haze particles at optical wavelengths.这些是迄今为止针对系外行星报道的最小的不确定性之一，证明了HST和Spitzer系外行星观测的功率和局限性。
Recently, we introduced PLanetary Atmospheric Tool for Observer Noobs (PLATON), a Python package that calculates model transmission spectra for exoplanets and retrieves atmospheric characteristics based on observed spectra. We now expand its capabilities to include the ability to compute secondary eclipse depths. We have also added the option to calculate models using the correlated-$k$ method for radiative transfer, which improves accuracy without sacrificing speed. Additionally, we update the opacities in PLATON--many of which were generated using old or proprietary line lists--using the most recent and complete public line lists. These opacities are made available at R=1000 and R=10,000 over the 0.3--30 um range, and at R=375,000 in select near IR bands, making it possible to utilize PLATON for ground-based high resolution cross correlation studies. To demonstrate PLATON's new capabilities, we perform a retrieval on published HST and Spitzer transmission and emission spectra of the archetypal hot Jupiter HD 189733b. This is the first joint transit and secondary eclipse retrieval for this planet in the literature, as well as the most comprehensive set of both transit and eclipse data assembled for a retrieval to date. We find that these high signal-to-noise data are well-matched by atmosphere models with a C/O ratio of $0.66_{-0.09}^{+0.05}$ and a metallicity of $12_{-5}^{+8}$ times solar where the terminator is dominated by extended nanometer-sized haze particles at optical wavelengths. These are among the smallest uncertainties reported to date for an exoplanet, demonstrating both the power and the limitations of HST and Spitzer exoplanet observations.
