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arXiv · 2202.12314

The Hubble PanCET program: Emission spectrum of hot Jupiter HAT-P-41b

Guangwei Fu·David K. Sing·Drake Deming·Kyle Sheppard·H. R. Wakeford·Thomas Mikal-Evans·Munazza K. Alam·Leonardo A. Dos Santos·Mercedes López-Morales
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Abstract

We present the most complete emission spectrum for inflated hot Jupiter HAT-P-41b combining new HST WFC/G141 spectrum from the Hubble Panchromatic Comparative Exoplanet Treasury (PanCET) program with archival Spitzer eclipse observations. We found a near blackbody-like emission spectrum which is best fitted with an isothermal temperature-pressure (TP) profile that agrees well with the dayside heat redistribution scenario assuming zero Bond albedo. The non-inverted TP profile is consistent with the non-detection of NUV/optical absorbers in the transit spectra. We do not find any evidence for significant H$^-$ opacity nor a metal-rich atmosphere. HAT-P-41b is an ideal target that sits in the transitioning parameter space between hot and ultra-hot Jupiters, and future JWST observations will help us to better constrain the thermal structure and chemical composition.

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Guangwei Fu, David K. Sing, Drake Deming, Kyle Sheppard, H. R. Wakeford, Thomas Mikal-Evans, Munazza K. Alam, Leonardo A. Dos Santos, Mercedes López-Morales. 2022-02-24. The Hubble PanCET program: Emission spectrum of hot Jupiter HAT-P-41b. https://doi.org/10.3847/1538-3881%2Fac58fc

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