Convergent Migration Renders TRAPPIST-1 Long-lived

  title={Convergent Migration Renders TRAPPIST-1 Long-lived},
  author={Daniel Tamayo and Hanno Rein and Cristobal Petrovich and Norman W. Murray},
  journal={The Astrophysical Journal Letters},
TRAPPIST-1 is a late M-dwarf orbited by seven Earth-sized planets with orbital period ratios near a chain of mean motion resonances. Due to uncertain system parameters, most orbital configurations drawn from the inferred posterior distribution are unstable on short timescales of ∼0.5 Myr, even when including the eccentricity damping effect of tides. By contrast, we show that most physically plausible resonant configurations generated through disk migration are stable even without tidal… 

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