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[ascl:2202.003] Zwindstroom: Cosmological growth factors from fluid calculations

Zwindstroom computes background quantities and scale-dependent growth factors for cosmological models with free-streaming species, such as massive neutrinos. Following the earlier REPS code (ascl:1612.022), the code uses a Newtonian fluid approximation with external neutrino sound speed to close the Boltzmann hierarchy. Zwindstroom supports multi-fluid models with distinct transfer functions and sound speeds. A flexible python interface facilitates interaction with CLASS (ascl:1106.020) through classy. There is also a Zwindstroom plugin for the cosmological initial conditions generator monofonIC (ascl:2008.024) that allows for higher-order LPT ICs for massive neutrino simulations in a single step.

Code site:
https://github.com/wullm/zwindstroom
Used in:
https://ui.adsabs.harvard.edu/abs/2022arXiv220200670E
Bibcode:
2022ascl.soft02003E

Views: 2222

ascl:2202.003
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