Migration of Hot Jupiters Induced by Atmosphere Outflow

— As is known, the influence of the ionizing radiation and the gravity of a star on a hot Jupiter results in the outflow of its atmosphere. Due to the gravity of the planet, the outflowing matter acquires angular momentum, after which it is accumulated on a higher circular orbit around the star and...

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Veröffentlicht in:Astronomy reports 2020-12, Vol.64 (12), p.1016-1025
Hauptverfasser: Kurbatov, E. P., Bisikalo, D. V., Shaikhislamov, I. F.
Format: Artikel
Sprache:eng
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Zusammenfassung:— As is known, the influence of the ionizing radiation and the gravity of a star on a hot Jupiter results in the outflow of its atmosphere. Due to the gravity of the planet, the outflowing matter acquires angular momentum, after which it is accumulated on a higher circular orbit around the star and forms a disk or a torus. The angular momentum interexchange between the torus and the planet induces the migration of the planet to the star. In this paper, we consider the effectiveness of this migration mechanism by the example of the HD 209458 system. It turns out that, after 4.5 × 10 9 years since the evaporation of the protoplanetary disk, the planet might migrate from an orbit at ≳0.67 AU to its current orbit at 0.045 AU.
ISSN:1063-7729
1562-6881
DOI:10.1134/S1063772920120069