Module Mdot

Step function for the mass-loss rate.

When used for the dust mass-loss rate, requires the inner radius of the dust shell to be given as r0.

Can be used also for the gas mass-loss rate with a step anywhere in the wind This is not a smooth transition.

At r < r0: rate_inner, at r >= r0: rate.

Parameters:

• r (array/float) - r grid (can be array or float)
• rate (float) - The dust mass-loss rate from r0 onward
• r0 (float) - The dust condensation radius
• rate_inner (float) - The mass-loss rate in the inner region at r<r0. Default typically used for the dust mass-loss rate, with r0 the condensation radius.

  (default: 0.0)

Returns: array

The dust mass-loss rate profile as a function of r