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The Tale of a Hungry Subgiant and Its Brown Dwarf: Interior Radiative Damping Dominates the Tidal Evolution of TOI-5882

  • Authors: Ritvik Sai Narayan, Melinda Soares-Furtado, Richard H. D. Townsend

Ritvik Sai Narayan et al 2026 The Astrophysical Journal Letters 1005 .

  • Provider: AAS Journals

Caption: Figure 5.

We show the total tidal torque as a function of the orbital forcing frequency, with the four tidal prescriptions. The top panel tracks the evolution of the torque as TOI-5882 evolves until RLOF, illustrating the onset of resonance crossings at higher forcing frequencies. The bottom panel isolates the angular-momentum evolution in the early RGB phase by applying varying forcing frequencies to the same stellar model as Figures 2, 3, and 4, with the limits of the calculation indicated by the inset rectangle in the top panel. The vertical line shows the current period of the BD.

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