The elemental and isotopic abundances of volatiles like carbon, oxygen, and nitrogen may trace a planet’s formation location relative to H2O, CO2, CO, NH3, and N2 “snowlines”, or the distance […]
WASP-77A b
![Best-fit free retrieval of the JWST NIRSpec and HST WFC3 data for WASP-77A b. The coloured regions show the individual contribution of three species (H2O, CO, and TiO) and Collision Induced Absorption (CIA), while the inset shows the 1, 2, and 3σ confidence intervals for the retrieved temperature-pressure (T − p) profile. These three species are detected in the HST and JWST data, allowing us to place constraints on elemental ratios for this atmosphere. The best-fit T − p profile has a positive lapse rate (i.e, no evidence for a thermal inversion) in the pressure region probed by our observations (p ∈ [105 , 100] Pa). -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/02/MeasuringTracers.png?resize=1200%2C719&ssl=1)
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
Measuring Tracers of Planet Formation in the Atmosphere of WASP-77A b: Sub-stellar O/H and C/H ratios, with a stellar C/O ratio and a potentially Super-stellar Ti/H ratio
We present a comprehensive atmospheric retrieval study of the hot Jupiter WASP-77A b using eclipse observations from the Hubble Space Telescope (HST) and JWST.