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Is TiO emission present in the ultra-hot Jupiter WASP-33b? A reassessment using the improved ExoMol Toto line list
Dilovan B. Serindag, Stevanus K. Nugroho, Paul Mollière +3
[abridged] Efficient absorption of stellar UV and visible radiation by TiO and VO is predicted to drive temperature inversions in the upper atmospheres of hot Jupiters. However, fe…
A New Window into Planet Formation and Migration: Refractory-to-Volatile Elemental Ratios in Ultra-hot Jupiters
Joshua D. Lothringer, Zafar Rustamkulov, David K. Sing +3
A primary goal of exoplanet characterization is to use a planet's current composition to understand how that planet formed. For example, the C/O ratio has long been recognized as c…
Ground-Based Transmission Spectroscopy with FORS2: A featureless optical transmission spectrum and detection of HO for the ultra-hot Jupiter WASP-103b
J. Wilson, N. P. Gibson, N. Nikolov +11
We report ground-based transmission spectroscopy of the highly irradiated and ultra-short period hot-Jupiter WASP-103b covering the wavelength range 400-600 nm using the…
Detection of Fe\,{\sc i} Emission in the Day-side Spectrum of WASP-33b
Stevanus K. Nugroho, Neale P. Gibson, Ernst J. W. de Mooij +4
We analyze the high-resolution emission spectrum of WASP-33b taken using the High Dispersion Spectrograph (R\,\,165,000) on the 8.2-m Subaru telescope. The data cover \…
Searching for Thermal Inversion Agents in the Transmission Spectrum of MASCARA-2b/KELT-20b: Detection of Neutral Iron and Ionised Calcium HK Lines
Stevanus K. Nugroho, Neale P. Gibson, Ernst J. W. de Mooij +3
We analyse the transmission spectra of KELT-20b/MASCARA-2b to search for possible thermal inversion agents. The data consist of three transits obtained using HARPSN and one using C…
Non-detection of TiO and VO in the atmosphere of WASP-121b using high-resolution spectroscopy
Stephanie R. Merritt, Neale P. Gibson, Stevanus K. Nugroho +9
Thermal inversions have long been predicted to exist in the atmospheres of ultra-hot Jupiters. However, detection of two species thought to be responsible -- TiO and VO -- remain e…