论文标题
GPI 2.0：通过低分辨率红外光谱表征自发射系外行星
GPI 2.0: Characterizing Self-Luminous Exoplanets Through Low-Resolution Infrared Spectroscopy
论文作者
论文摘要
直接成像表征外星行星通常以低光谱分辨率进行。我们对Gemini Planet Imager升级（GPI 2.0）的光谱仪进行建模，并评估仪器通过分析近红外光谱来限制外部球星的潜力。我们模拟了嘈杂的观察结果，然后从最大似然比较与Sonora 2018模型网格中对后验分布进行计算。初步结果表明，GPI 2.0应允许观察者以足够的准确性来限制温度，但重力仍然不确定。我们还探讨了将卷积与仪器线扩散函数纳入我们的模拟的影响，并将结果与我们的初步发现进行比较。
Direct imaging characterization of extrasolar planets is often done at low spectral resolution. We model the spectrograph for the Gemini Planet Imager upgrade (GPI 2.0) and assess the instrument's potential for allowing observers to constrain exoplanet properties through analysis of near-infrared spectra. We simulated noisy observations followed by calculations of posterior distributions from maximum likelihood comparison with the Sonora 2018 model grid. Preliminary results suggest that GPI 2.0 should allow observers to constrain temperature with sufficient accuracy, but gravity remains largely uncertain. We also explore the effects of incorporating convolution with the instrument line spread function into our simulation and compare the results with our preliminary findings.
