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TOI-2155 b: A Massive Brown Dwarf or a Very Low-mass Star?

  • Authors: Md Redyan Ahmed, Tansu Daylan, Theron W. Carmichael, Sarah L. Casewell, Anita Hafner, Jaime A. Alvarado-Montes, Allyson Bieryla, Samuel N. Quinn, Michael Calkins, Karen A. Collins, Cristilyn N. Watkins, Keivan G. Stassun, Boris S. Safonov, Maria V. Goliguzova, Giuseppe Marino, Dennis M. Conti, Peter Tuthill

Md Redyan Ahmed et al 2026 The Astronomical Journal 172 .

  • Provider: AAS Journals

Caption: Figure 14.

Circularization timescale τ as a function of the stellar tidal quality factor Q⋆ calculated using the equilibrium tide formalism of B. Jackson et al. (2008). The colored curves correspond to different assumed BD tidal quality factors QBD. The dashed red line marks the system age of ﹩3.{2}_{-0.9}^{+1.9}﹩ Gyr, with the shaded region indicating its uncertainty. For typical tidal quality factors, the calculated timescales lie below the system age.

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