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Table 1
Default disk and stellar parameters of TRAPPIST-1 during the planet formation phase.
Symbol | Description | Value | Comments |
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α | viscosity parameter inner disk | 10-3 | a |
δ ice | fractional width of iceline | 0.05 | |
γ I | prefactor in type-I migration rate | 4 | b |
ξ | # e-foldings to reach pebble size | 10 | |
τ p | pebble dimensionless stopping time exterior to iceline | 0.05 | c |
ζ | dust fraction in pebbles | 0.5 | |
h | inner disk aspect ratio | 0.03 | |
r out | outer disk radius | 200 au | |
B ⋆ | stellar magnetic field strength at surface | 180G | |
M ⋆ | stellar mass | 0.08M⊙ | |
M disk | disk mass (gas) | 0.04M⋆ | |
Ṁ g | accretion rate | 10-10M⊙yr-1 | |
R ⋆ | stellar radius | 0.5R⊙ | |
Z 0 | disk metallicity (global solids-to-gas mass ratio) | 0.02 |
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