HD 209458 b大气中钙和可能的钪和氢的地基探测
Ground-based detection of Calcium and possibly Scandium and Hydrogen in the atmosphere of HD 209458b
摘要：
内容：自哈勃空间望远镜首次探测系外行星大气以来，由于大地校正技术的增强，从地面对系外行星大气的表征在分析此类大气中发挥着越来越重要的作用。目前，在HD 209458 b的大气中已经发现了几种物种，它们都与理论模型相一致。目的：重新分析使用斯巴鲁望远镜上的高色散摄谱仪获得的数据。我们希望在系外行星HD 209458 b的大气中发现新物种。除了阐明大气成分外，我们还将推导出系外行星大气中存在的吸收剂的径向延伸。方法：我们提出了一种替代的方法来纠正大地效应，通过分析的变化谱线与空气质量。为了搜索由于系外行星大气引起的反射，我们实现了一种算法，以自动搜索透射光谱中和数据中的波长范围内呈现大气特征的所有特征。为了估计不确定性，我们进行了自举分析。结果如下：在透射光谱中检测到由钙在6162.17 A和6493.78 A、钪在5526.79 A、氢在6562.8 A和钠双重态的跃迁引起的吸收过量，其水平为-0.079+-0.012%、-0.138+-0.013%、-0.059+-0.012%、-0.123+-0.012%、分别使用0.5A、0.4A、0.5A、1.1A和0.6A的通带，-0.071+-0.016%。结论：模型预测了钠共振双重峰中的强吸收，这在本分析中也是先前检测到的。然而，这是HD 209458 b中钙和可能钪的第一份报告，包括可能的氢地面探测。...（续）
英文摘要：
Context: Since the first exoplanetary atmosphere detection using the Hubble Space Telescope, characterization of exoplanet atmospheres from the ground have been playing an increasingly important role in the analysis of such atmospheres thanks to the enhancement of telluric correction techniques. At present, several species have been discovered in the atmosphere of HD 209458b, all of them consistent with theoretical models. Aims: Data acquired using the High Dispersion Spectrograph on the Subaru telescope are re-analysed. We expect to discover new species in the atmosphere of the exoplanet HD 209458b. In addition to shed light on the atmospheric composition, we will derive the radial extension of the absorbents present in the atmosphere of the exoplanet. Methods: We present an alternative method to correct the telluric effects through the analysis of variations in spectral lines with the airmass. To search absorptions due to an exoplanetary atmosphere we implemented an algorithm to automatically search for all the features presenting an atmospheric signature in the transmission spectrum and through the wavelength range in the data. In order to estimate uncertainties we perform a bootstrapping analysis. Results: Absorption excess due to the transitions of Calcium at 6162.17A and 6493.78A, Scandium at 5526.79A, Hydrogen at 6562.8A and Sodium doublet are detected in the transmission spectrum at a level of -0.079+-0.012%, -0.138+-0.013%, -0.059+-0.012%, -0.123+-0.012%, -0.071+-0.016% using pass-bands of 0.5A, 0.4A, 0.5A, 1.1A and 0.6A, respectively. Conclusions: Models predict strong absorption in the Sodium resonance Doublet which was previously detected, also in this analysis. However, this is the first report of Calcium and possibly Scandium in HD 209458b, including the possible ground-based detection of Hydrogen. ... (continues)
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
