Exoplanet Atmosphere Forecast: Observers Should Expect Spectroscopic Transmission Features to be Muted to 33%

Abstract

To ensure robust constraints are placed on exoplanet atmospheric transmission spectra, future observations need to obtain high signal-to-noise ratio (SNR) measurements assuming smaller amplitude molecular signatures than those of clear solar metallicity atmospheres. Analyzing 37 exoplanet transmission spectra we find clear solar molecular features are measured in <7% of cases.

Published by RNAAS January 2019, Volume 3, Issue 1

References in corpus (7)

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• A Hubble PanCET Study of HAT-P-11b: A Cloudy Neptune with a Low Atmospheric Metallicity
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• JWST Transit Spectra I: Exploring Potential Biases and Opportunities in Retrievals of Tidally-locked Hot Jupiters with Clouds and Hazes
• The HST PanCET Program: An Optical to Infrared Transmission Spectrum of HAT-P-32Ab
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• How Does Thermal Scattering Shape the Infrared Spectra of Cloudy Exoplanets? A Theoretical Framework and Consequences for Atmospheric Retrievals in the JWST era
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• JWST NIRCam Defocused Imaging: Photometric Stability Performance and How it Can Sense Mirror Tilts
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• L 98-59: a Benchmark System of Small Planets for Future Atmospheric Characterization