论文标题
使用Hubble Space望远镜上的宽场摄像头3对热木星Corot-1 B的大气表征
Atmospheric Characterization of Hot Jupiter CoRoT-1 b Using the Wide Field Camera 3 on the Hubble Space Telescope
论文作者
论文摘要
系外类型Corot-1 B很吸引人，因为我们预测它是热木星（平衡温度〜1500 K）和超热木星（平衡温度> 2000 K）之间的过渡行星。在2012年，COROT-1 B的观察结果包括一个主要的运输量和三个二次蚀，并与Hubble空间望远镜（HST）宽场摄像头3（WFC3）结合了G141 Grism（1.1-1.7 $ $ M）的凝视模式。我们的目的是通过其二聚体进一步研究Corot-1 B，从而产生分光光度测量光曲线，以易于电荷捕获，也称为与WFC3的时间序列观测中的坡道效应。我们发现，在纠正坡道效应并使用通常丢弃的第一轨道时，我们可以更好地限制和优化发射和传输光谱。我们在这种过渡温度方案中进行了网格检索，发现Corot-1 B的光谱是无特征的，并且与倒温的温度压力（T-P）曲线一致。但是，我们注意到WFC3的贡献函数表明，压力接近$ 10^{ - 3} $至$ 10^{0} $ bar，该函数与我们的T-P配置文件中的几乎等温区域相对应，从而表明高海拔高度的反转是模型的。尽管没有明显的特征，但对Corot-1 B进行的分析铺平了通过凝视模式光谱的高精度结果的方式。作为James Webb太空望远镜（JWST）方法的新一代观察，Corot-1 B可能是一个有趣的后续目标，因为JWST的NIRSPEC，MIRI和NIRCAM Instruments的时间序列光谱模式将类似于HST的凝视模式。
Exoplanet CoRoT-1 b is intriguing because we predict it to be a transitional planet between hot Jupiters (equilibrium temperatures ~ 1500 K) and ultra-hot Jupiters (equilibrium temperatures > 2000 K). In 2012, observations of CoRoT-1 b included one primary transit and three secondary eclipses with the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) combined with the G141 grism (1.1-1.7 $μ$m) in stare mode. We aimed to further investigate CoRoT-1 b through its secondary eclipses, producing spectrophotometric light curves corrected for charge trapping, also known as the ramp effect in time-series observations with the WFC3. We found that, when correcting for the ramp effect and using the typically discarded first orbit, we are better capable of constraining and optimizing the emission and transmission spectra. We did a grid retrieval in this transitional temperature regime and found the spectra for CoRoT-1 b to be featureless and to agree with an inverted temperature-pressure (T-P) profile. We note, however, that the contribution function for the WFC3 indicates pressures probed near $10^{-3}$ to $10^{0}$ bar, which correspond to a nearly isothermal region in our T-P profile, thereby indicating that the inversion at high altitude is model-dependent. Despite no distinct features, the analysis done on CoRoT-1 b paves the way to high-precision results with stare mode spectroscopy. As a new generation of observations from the James Webb Space Telescope (JWST) approaches, CoRoT-1 b might be an interesting follow-up target because the time-series spectroscopic modes of JWST's NIRSpec, MIRI, and NIRCam instruments will be analogous to HST's stare mode.
