The Hubble PanCET Program: Emission Spectrum of Hot Jupiter HAT-P-41b
Deming, Drake; Mikal-Evans, Thomas; Sing, David K.; Fu, Guangwei; López-Morales, Mercedes; Alam, Munazza K.; Lothringer, Joshua D.; Wakeford, H. R.; Sheppard, Kyle; Dos Santos, Leonardo A.
United States, United Kingdom, Switzerland
Abstract
We present the most complete emission spectrum for inflated hot Jupiter HAT-P-41b combining new Hubble Space Telescope Wide Field Camera/G141 spectrum from the Hubble Panchromatic Comparative Exoplanet Treasury 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 noninverted TP profile is consistent with the nondetection of near-UV/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 James Webb Space Telescope observations will help us to better constrain the thermal structure and chemical composition.