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    • Simulating Medium-Spectral-resolution Exoplanet Characterization with SCALES Angular/reference Differential Imaging

    Ground-based and Airborne Instrumentation for Astronomy X（2024）

    UC Irvine

    Cited 0|Views64
    Abstract
    SCALES (Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy) is a 2 - 5 micron high-contrast lenslet-based integral field spectrograph (IFS) designed to characterize exoplanets and their atmospheres. The SCALES medium-spectral-resolution mode uses a lenslet subarray with a 0.34 x 0.36 arcsecond field of view which allows for exoplanet characterization at increased spectral resolution. We explore the sensitivity limitations of this mode by simulating planet detections in the presence of realistic noise sources. We use the SCALES simulator scalessim to generate high-fidelity mock observations of planets that include speckle noise from their host stars, as well as other atmospheric and instrumental noise effects. We employ both angular and reference differential imaging as methods of disentangling speckle noise from the injected planet signals. These simulations allow us to assess the feasibility of speckle deconvolution for SCALES medium resolution data, and to test whether one approach outperforms another based on planet angular separations and contrasts.
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    High Angular Resolution,Wavefront Sensing,Multi-Object Spectroscopy,Spectrograph,Wide-Field Spectroscopy
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    【要点】：本论文通过模拟实验探索了SCALES中等光谱分辨率模式在探测系外行星及其大气方面的性能，并比较了不同去噪方法的效率。
    

    【方法】：研究采用了SCALES模拟器生成的高保真模拟观测数据，结合角差分成像和参考差分成像技术来分离星源散斑噪声和其他大气及仪器噪声。
    

    【实验】：通过模拟在不同角分离和对比度条件下对系外行星的探测，实验评估了SCALES中等分辨率数据去斑点卷积的可行性，并测试了不同方法在不同条件下的表现。使用的数据集为高保真模拟的系外行星数据集，实验结果表明，在某些条件下，角差分成像和参考差分成像技术均能有效分离噪声。
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