vice.yields.ccsne.engines.E16.m4¶
Type : list [elements of type float]
The quantity \(M_4\) at the time of core collapse for stars with
ZAMS masses given by the attribute masses. \(M_4\) is defined
as the normalized mass enclosed in a region defined by the
dimensionless energy per nucleon of \(s\) = 4.
Ertl et al. (2016) [1] conclude that the quantities \(M_4\) and \(\mu_4\) 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%):
\[\mu_4 \leq a M_4 \mu_4 + b\]
where they report \(a\) = 0.283 and \(b\) = 0.043 as best fit
values. The values of \(a\) and \(b\) are controlled by the
attributes slope and intercept respectively.
Note
This attribute’s values are adopted from Sukhbold et al. (2016) [2].
Example Code¶
>>> from vice.yields.ccsne.engines import E16
>>> E16.m4
[1.357,
1.36955,
1.38349,
...,
1.66232,
1.81781,
1.60252]
