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引用次数: 0
摘要
通过凌日光谱(TS)捕捉系外行星大气(CEA)的特征对我们了解行星的形成和演化具有深远的意义。然而,TS 是用于探测 CEA 的方法,它间接地从凌日过程中恒星光谱的微妙变化中提取这些特征,这就要求光学仪器具有高度的观测稳定性。为了减少光学系统内光谱能量的观测误差,本论文深入研究了在凌日观测中为大气光谱量身定制的高稳定性光学系统的优化设计。首先,根据凌日观测策略,建立了一个适合 EAC 检索的凌日信噪比(S/N)理论模型。随后,通过分析影响信噪比的光学因素,探讨了光学系统的最佳参数和设计方法。利用光学仪器观测模拟器,验证了捕捉 CEA 的优化光学系统的探测可行性。
Research on the Optimal Design of the High-stability Optical System for Atmospheric Spectra in Transit Observation
Capturing the characteristics of exoplanetary atmospheres (CEA) through transit spectroscopy (TS) holds profound implications for our understanding of planetary formation and evolution. However, TS, the method employed for detecting CEA, indirectly extracts these characteristics from the subtle variations in stellar spectra during the transit process, necessitating a high level of observational stability in optical instrumentation. To mitigate observational errors in spectral energy within the optical system, this dissertation delves into the optimal design of a high-stability optical system tailored for atmospheric spectra in transit observations. Initially, a theoretical model of transit signal-to-noise ratios (S/Ns) catered to the EAC retrievals is formulated based on transit observation strategies. Subsequently, the optimal parameters and design approach for the optical system are explored through an analysis of the optical factors influencing S/N. Leveraging an observation simulator for optical instruments, the detection feasibility of the optimized optical system for capturing CEA is validated.
期刊介绍:
The Publications of the Astronomical Society of the Pacific (PASP), the technical journal of the Astronomical Society of the Pacific (ASP), has been published regularly since 1889, and is an integral part of the ASP''s mission to advance the science of astronomy and disseminate astronomical information. The journal provides an outlet for astronomical results of a scientific nature and serves to keep readers in touch with current astronomical research. It contains refereed research and instrumentation articles, invited and contributed reviews, tutorials, and dissertation summaries.