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

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.

Accepted for publication in AJ

References in corpus (13)

• A Precise Water Abundance Measurement for the Hot Jupiter WASP-43b
• An ultrahot gas-giant exoplanet with a stratosphere
• Fingering convection and cloudless models for cool brown dwarf atmospheres
• HAT-P-26b: A Neptune-Mass Exoplanet with a Well Constrained Heavy Element Abundance
• The Effects of Consistent Chemical Kinetics Calculations on the Pressure-Temperature Profiles and Emission Spectra of Hot Jupiters
• Climate of an Ultra hot Jupiter: Spectroscopic phase curve of WASP-18b with HST/WFC3
• Statistical Analysis of Hubble/WFC3 Transit Spectroscopy of Extrasolar Planets
• A unique hot Jupiter spectral sequence with evidence for compositional diversity
• The Influence of Host Star Spectral Type on Ultra-Hot Jupiter Atmospheres
• Evidence for disequilibrium chemistry from vertical mixing in hot Jupiter atmospheres. A comprehensive survey of transiting close-in gas giant exoplanets with warm-Spitzer/IRAC
• UV Exoplanet Transmission Spectral Features as Probes of Metals and Rainout
• Strong H${}_2$O and CO emission features in the spectrum of KELT-20b driven by stellar UV irradiation
• The Hubble PanCET program: Transit and Eclipse Spectroscopy of the Hot Jupiter WASP-74b

Cited by in corpus (1)

• A Global Perspective with Updated Constraints on the Ultra-hot Jupiter WASP-19b: Atmospheric Properties and Stellar Activity