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The future of Jupiter-like planets around Sun-like stars: first steps

Published online by Cambridge University Press:  16 August 2023

T. Konings Open the ORCID record for T. Konings [Opens in a new window] ,
R. Baeyens  and
L. Decin
T. Konings
Affiliation:
Institute of Astronomy, KU Leuven - Celestijnenlaan 200D bus 2401, 3001 Leuven, Belgium
R. Baeyens
Affiliation:
Institute of Astronomy, KU Leuven - Celestijnenlaan 200D bus 2401, 3001 Leuven, Belgium
L. Decin
Affiliation:
Institute of Astronomy, KU Leuven - Celestijnenlaan 200D bus 2401, 3001 Leuven, Belgium
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Abstract

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Planets that orbit low- to intermediate mass main sequence (MS) stars will experience vigorous star-planet interactions when the host star evolves through the giant branches, including the asymptotic giant branch (AGB) phase, due to extreme luminosities and stellar outflows. In this work, we take the first steps towards understanding how a planet’s temperature profile and chemical composition is altered when the host star evolves from the MS to the AGB phase. We used a 1D radiative transfer code to compute the temperature-pressure profile and a 1D chemical kinetics code to simulate the disequilibrium chemistry. We consider a Jupiter-like planet around a Solar-type star in two evolutionary stages (MS and AGB planet) by only varying the stellar luminosity. We find that the temperature throughout the AGB planet’s atmosphere is increased by several hundreds of Kelvin compared to the MS planet. We also find that CO joins H2O and CH4 as a prominent constituent in the AGB planet’s atmospheric composition.

Keywords

stars: AGB and post-AGBPlanets and satellites: gaseous planetsPlanets and satellites: atmospheres
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 17 , Symposium S370: Winds of Stars and Exoplanets , August 2021 , pp. 275 - 277
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Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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