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Revealing the Origin of Desert Dwellers via Stellar Obliquities

  • Authors: Tim Hallatt, James E. Owen, Sarah Millholland

Tim Hallatt et al 2026 The Astrophysical Journal Letters 1005 .

  • Provider: AAS Journals

Caption: Figure 3.

Similar to Figure 2, except with initial angular momentum budget dominated by the planet orbit. To explore this L ≫ S regime, this example uses a 900 M hot Jupiter as well as a slowly rotating star (P = 30 days; we also use a stellar tidal quality factor Q = 105). When orbital angular momentum dominates the stellar spin, obliquity tides damp the system into spin–orbit alignment ﹩{before}﹩ Roche-lobe overflow (according to our weak friction, equilibrium tide approach).

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