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Table 6
Disc symbols and their definition.
| Symbol | Definition |
|
|
|
|
Common symbol for disc properties |
|
Disc mass enclosed in a radius r [Eq. (57)] |
|
Total mass of the disc [Eq. (57)] |
|
Dimensionless radius [Eq. (57)] |
|
Exponential characteristic radius [Eq. (57)] |
|
Gas mass in the disc [Eq. (59)] |
|
Stellar mass in the disc [Eq. (59)] |
|
Circular velocity [Eqs. (60), (55)] |
|
Average velocity dispersion [Eqs. (61), (67)] |
| E σ v | Energy: gas velocity dispersion [Eq. (61)] |
| E V | Energy: gas rotation [Eq. (62)] |
| E inf | Rotational energy of the infall accreted disc [Eq. (63)] |
| E sn,σv | Turbulent energy injected by sn [Eq. (64)] |
| f disp | Energy dissipation factor = 0.05 [Eq. (65)] |
|
Disc dynamical time [Eq. (67)] |
| σ r | Average radial velocity dispersion [Eq. (67)] |
| Q | Toomre parameter [Eq. (68)] |
| κ | Epicyclic frequency [Eqs. (69), (68)] |
|
Average gas surface density [Eq. (68)] |
|
Disc radius that encloses 90% of the mass [Eq. (68)] |
| Ω | Angular velocity [Eq. (69)] |
| Q crit | Critical Toomre parameter = 1.0 [Eq. (68)] |
Notes. Symbols are listed in order of appearance. Model parameters are in boldfaced text.
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