WASP-107 Archives

A5 Apparent chromatic offsets in WASP-107b’s time of conjunction with wavelength due to limb asymmetry. Shown are the best-fit times of conjunction as a function of wavelength when fitting our JWST/NIRCam F322W2 data by itself. We fit the data using a uniformlimb transit model, described in Section 3.4.2, fitting only for tc, the planet-star radius ratio, and a linear flux vs. time ramp model. The black points are the result from fitting each of our thirty spectroscopic light curves. The purple line is the result from fitting the broadband light curve, with the shaded region representing the 1-σ uncertainty. We show the difference between these results and the joint-fit time of conjunction derived by fitting other multi-wavelength data sets simultaneously, whose uncertainty is shown as the green shaded region. The observed difference is due to the significant evening-morning limb asymmetry on WASP-107b at these wavelengths. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Evidence for Morning-to-Evening Limb Asymmetry on the Cool Low-Density Exoplanet WASP-107b

by Keith CowingJune 22, 2024June 22, 2024

Transmission spectroscopy has enabled unprecedented insights into the makeup of exoplanet atmospheres. A transmission spectrum combines contributions from a planet’s morning and evening limbs, but these limbs may have different […]

WASP-107

Evidence for Morning-to-Evening Limb Asymmetry on the Cool Low-Density Exoplanet WASP-107b

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