Characterization of extrasolar planets through transmission spectroscopy

通过透射光谱表征太阳系外行星

• 批准号: 281454604
• 负责人: Professor Dr. Jürgen H.M.M. Schmitt
• 金额: --
• 依托单位: Hamburger Sternwarte
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/281454604?language=en
• 关键词: Characterization; extrasolar; planets; through; transmission

In the framework of this funding application we propose to perform transmission spectroscopy of extrasolar planets in the sodium D lines. The sodium D1 and D2 lines are -- normally -- strong absorption lines in the spectrum of a cool star. During the primary transit of a ``Hot Jupiter'' any sodium present in the planetary atmosphere will lead to an additional absorption signal.While originally carried out and pioneered from space, recently a number of ground-based measurements of excess sodium absorption during planetary transits have been published with somewhat controversial results. We propose use our VLT/UVES data on HD189733b and WASP-7b for a thorough investigation of the feasibility of VLT/UVES data for sodium transmission spectroscopy. We propose to study various methods of analysis for the data extraction and preparation, assess the influence of telluric line contamination with various methods and study the possible influence of stellar activity on possible changes in the sodium absorption. Finally we propose to use atmospheric circulation models coupled with a 3D-radiative transfer treatment to compute model sodium transmission curves and compare them to the available observations.

在此资助应用程序的框架内，我们建议在钠D线中执行对极性行星的传播光谱。 D1和D2线钠通常是酷星光谱中的强吸收线。 在``热木星''的主要运输过程中，在行星大气中存在的任何钠都会导致额外的吸收信号。虽然最初是在空间中进行的，但在行星转移期间，在太空中进行了一系列基于地面的过量钠吸收的测量，并以某种有争议的结果发布了。 我们建议在HD189733B和WASP-7B上使用VLT/UVE数据，以彻底研究VLT/UVE数据对钠传输光谱的可行性。 我们建议研究用于数据提取和制备的各种分析方法，以各种方法评估矫治线污染的影响，并研究恒星活性对钠吸收可能变化的可能影响。 最后，我们建议使用与3D辐射转移处理结合的大气循环模型来计算模型钠传输曲线，并将其与可用的观测值进行比较。

项目成果

The atmosphere of WASP-17b: Optical high-resolution transmission spectroscopy

WASP-17b 的大气层：光学高分辨率透射光谱

• DOI: 10.1051/0004-6361/201732029
• 发表时间: 2017
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Khalafinejad