vice.singlezone.smoothing
=========================

Type : real number

Default : 0.0

The outflow smoothing timescale in Gyr (Johnson & Weinberg 2020 [1]_).
This is the timescale on which the star formation rate is time-averaged
before determining the outflow rate via the mass loading factor
(attribute ``eta``). For an outflow rate :math:`\dot{M}_\text{out}`
and a star formation rate :math:`\dot{M}_\star` with a smoothing time
:math:`\tau_\text{s}`:

.. math:: \dot{M}_\text{out} =
	\eta(t) \langle\dot{M}_\star\rangle_{\tau_\text{s}}

The traditional relationship of
:math:`\dot{M}_\text{out} = \eta \dot{M}_\star` is recovered when the
user specifies a smoothing time that is smaller than the timestep
size.

.. note::

	While this parameter time-averages the star formation rate, it
	does NOT time-average the mass-loading factor.

Example Code
------------
>>> import vice
>>> sz = vice.singlezone(name = "example")
>>> sz.smoothing = 0.0
>>> sz.smoothing = 0.5
>>> sz.smoothing = 1.0

.. [1] Johnson & Weinberg (2020), MNRAS, 498, 1364