vice.yields.ccsne.engines.E16.slope
===================================

Type : ``float`` [default : 0.283]

The slope of the line in :math:`\mu_4-M_4\mu_4` space dividing
progenitors which explode and collapse. Ertl et al. (2016) [1]_ argue
that the quantities :math:`M_4` and :math:`\mu_4` can predict whether
or not a massive star will produce a core collapse supernova based on
the following criterion with only a few exceptions (~1 - 2.5%):

.. math:: \mu_4 \leq a M_4 \mu_4 + b

where this attribute encodes the value of :math:`a`.

Example Code
------------
>>> from vice.yields.ccsne.engines import E16
>>> E16.slope
0.283
>>> E16.slope = 0.3
>>> E16.slope
0.3
>>> E16.slope = 0.25
>>> E16.slope
0.25

.. [1] Ertl et al. (2016), ApJ, 818, 124