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Table B.1
List of symbols used in this paper.
| Symbol | Explanation | Typical valuea |
|
|
||
| r | radial distance to the star | |
| a | particle’s radius | |
| a0 | monomer size | 1 μm |
| afrag | fragmentation limited size | |
| adrift | drift limited size | |
| τgrowth | growth timescale | |
| τdrift | radial drift timescale | |
| St | particle’s Stokes number | |
| ts | particle’s stopping time | |
| ρ• | particle’s internal density | 1 g cm-3 |
| vK | Keplerian velocity | |
| ΩK | Keplerian frequency | |
| TK | orbital period | |
| Σg | surface density of gas | |
| Σd | surface density of dust | |
| ρ g | gas density | |
| ρd | dust density | |
| ϵ | local dust-to-gas ratio | |
| Δv | impact velocity | |
| vth | fragmentation threshold velocity | 10 m s-1 |
| vr,d | radial drift velocity of dust | |
|
mass weighted average drift speed | |
| η vK | headwind speed | |
| Hg | scale height of gas | |
| Hd | scale height of dust | |
| αt | turbulence strength | 10-3 |
| cs | sound speed in gas | |
| Pg | gas pressure | |
| Dg | gas diffusivity | |
| Z | vertically integrated dust-to-gas ratio | 10-2 |
| M⋆ | mass of the central star | 1 M⊙ |
| Mdisc | protoplanetary disc mass | 0.1 M⊙ |
| Mtot | total initial mass of solids | |
| Mplts | final mass of planetesimals | |
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