Retrieving planet formation parameters of WASP-77Ab using SimAb

Abstract

The atmospheric compositions of planets offer a unique view into their respective formation processes. State-of-the-art observatories and techniques are finally able to provide high-precision data on atmospheric composition that can be used to constrain planet formation. In this context, we focus on the formation of WASP-77Ab based on previous observations of its atmosphere, which have provided precise C/O and metallicity measurements. We use the SimAb planet formation simulation to model the formation of WASP-77Ab. We assume two compositions for the disk WASP-77Ab was formed within: one of a solar composition and one that represents the composition of WASP-77A. In addition, we considered two different scenarios regarding the migration of the planet and we study the possible planet formation paths that reproduce the composition of WASP-77Ab. This work shows that the planet is expected to have formed in a disk where not many planetesimals could be accreted. Moreover, we demonstrate that the most likely migration scenario is disk-free migration, whereby the planet initiates its Type II migration within the CO ice line and ends it beyond the water ice line.

arXiv comment10 pages, 9 figures

References in corpus (29)

• The chemical composition of the Sun
• MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
• X-ray spectral modelling of the AGN obscuring region in the CDFS: Bayesian model selection and catalogue
• Shrinking binary and planetary orbits by Kozai cycles with tidal friction
• The effects of snowlines on C/O in planetary atmospheres
• Towards a Deterministic Model of Planetary Formation I: a Desert in the Mass and Semi Major Axis Distributions of Extra Solar Planets
• Planet-disk interaction and orbital evolution
• The imprint of exoplanet formation history on observable present-day spectra of hot Jupiters
• Towards Chemical Constraints on Hot Jupiter Migration
• Retrieving scattering clouds and disequilibrium chemistry in the atmosphere of HR 8799e
• Properties of planets in binary systems. The role of binary separation
• A solar C/O and sub-solar metallicity in a hot Jupiter atmosphere
• The In Situ Formation of Giant Planets at Short Orbital Periods
• Where is the Water? Jupiter-like C/H ratio but strong H${}_2$O depletion found on $\tau$ Boötis b using SPIRou
• WASP-77 Ab: A transiting hot Jupiter planet in a wide binary system
• Chemical Diversity in Protoplanetary Disks and Its Impact on the Formation History of Giant Planets
• A comparison of gyrochronological and isochronal age estimates for transiting exoplanet host stars
• The Solar Nebula on Fire: A Solution to the Carbon Deficit in the Inner Solar System
• The spatial distribution of carbon dust in the early solar nebula and the carbon content of planetesimals
• Connecting planet formation and astrochemistry: Refractory carbon depletion leading to super-stellar C/O in giant planetary atmospheres
• High-energy irradiation and mass loss rates of hot Jupiters in the solar neighborhood
• The composition of hot Jupiter atmospheres assembled within chemically evolved protoplanetary discs
• Evidence that the Hot Jupiter WASP-77 A b Formed Beyond Its Parent Protoplanetary Disk's H2O Ice Line
• The hot Jupiter period-mass distribution as a signature of in situ formation
• Detection of CO emission lines in the dayside atmospheres of WASP-33b and WASP-189b with GIANO
• How drifting and evaporating pebbles shape giant planets III: The formation of WASP-77A b and $\tau$ Boötis b
• SimAb: A simple, fast and flexible model to assess the effects of planet formation on the atmospheric composition of gas giants
• High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). II. Lucky Imaging results from 2015 and 2016
• Confirmation of Water Absorption in the Thermal Emission Spectrum of the Hot Jupiter WASP-77Ab with HST/WFC3

Cited by in corpus (3)

• 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
• C/O ratios in self-gravitating protoplanetary discs with dust evolution
• Unraveling the Mystery of the Peculiar and Young Hot Jupiter CoRoT-2b. I. H${}_2$O and CO Detection from Dayside Observations with Gemini-S/IGRINS