add new stellar evolution derivative from SSPtools #5
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Replaces (optionally, but by default) the old power law based stellar evolution logic with the new `LuminousEvMassLoss` class and derivatives from `ssptools`, re-using some of the quantities used in the `InitialBHPopulation` computation as well.
As it currently stands, starting with no BHs causes mbh=0/0=NaN at time 0 and thus causes the ODE solver to hang. This quick check just raises an error before that can happen. In principle this should be revisited and actually fixed in the future.
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Replaces (optionally, but by default) the old power law based stellar evolution logic with the new
LuminousEvMassLossclass and derivatives fromssptools, re-using some of the quantities used in theInitialBHPopulationcomputation as well.This adds the
ssp_sevflag, which should be turned on alongsidesspandsevto use the new logic. Also adds a new derivative to the ODEs, tracking the number of stars over time. Though currently this only includes the stellar evolution N losses, and doesn't affect anything but the mean stellar mass.Requires
astro-ssptools>=2.1.0.