| Issue |
A&A
Volume 675, July 2023
|
|
|---|---|---|
| Article Number | A95 | |
| Number of page(s) | 9 | |
| Section | Planets and planetary systems | |
| DOI | https://doi.org/10.1051/0004-6361/202245469 | |
| Published online | 05 July 2023 | |
Retrieving planet formation parameters of WASP-77Ab using SimAb
1
Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904,,
Amsterdam
1098XH, The Netherlands
e-mail: n.khorshid@uva.nl
2
SRON Leiden,
Niels Bohrweg 4,
2333 CA
Leiden, The Netherlands
3
Department of Space, Earth and Environment, Chalmers University of Technology, ,
Gothenburg
412 96, Sweden
e-mail: niloofar.khorshid@chalmers.se
Received:
15
November
2022
Accepted:
6
March
2023
Context. 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.
Aims. 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.
Methods. 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 consider two different scenarios regarding the migration of the planet and we study the possible planet formation paths that reproduce the composition of WASP-77Ab.
Results. 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.
Key words: planets and satellites: formation / planets and satellites: composition / planets and satellites: atmospheres
Note to the reader: Affiliations were not totally correct. They were corrected on 25 July 2023.
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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