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Stability of Multiplanet Systems through Hot Jupiter Destruction

  • Authors: Donald Liveoak, Tim Hallatt, Sarah Millholland

Donald Liveoak et al 2026 The Astrophysical Journal Letters 1002 .

  • Provider: AAS Journals

Caption: Figure 2.

Two example systems (top and bottom panels) comprising an outer gas giant companion (orange curves) to an inner hot Jupiter that undergoes RLO en route to becoming a desert dweller (blue curves). Left panels depict the planet mass evolution, middle panels depict the planet semimajor axis evolution, and right panels show the mutual inclination between the two planets. Top panels place the outer companion at 0.2 au; the system is only weakly perturbed by hot Jupiter destruction. Bottom panels use an external companion at ∼0.04 au; the system quickly goes unstable after destruction of the inner hot Jupiter. We find that instability requires very close-in companions.

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