Table 3
Parametric model attributes.
| Attribute | Prescription |
|---|---|
| Orientation | i, PA, xc, yc |
| Velocity |  |
| Upper surface | zup = z0(R/D0)p exp[–(R/Rt)q] |
| Lower surface | zlow = –z0(R/D0)p exp[–(R/Rt)q] |
| Peak intensity |  |
| Line width | ΔV = L0(R/D0)p(z/D0)q |
Notes. G is the gravitational constant and D0 = 100 au is a normalization factor. R is the cylindrical radius and z is the height from the midplane, always positive, r is the spherical radius. The other variables are free parameters, even if named alike they are modeled independently for each attribute.
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