Source code for camb.nonlinear

from .baseconfig import F2003Class, fortran_class
from ctypes import c_int, c_double

[docs]class NonLinearModel(F2003Class): """ Abstract base class for non-linear correction models """ _fields_ = [ ("Min_kh_nonlinear", c_double, "minimum k/h at which to apply non-linear corrections"), ]
halofit_original = 'original' halofit_bird = 'bird' halofit_peacock = 'peacock' halofit_takahashi = 'takahashi' halofit_mead = 'mead' halofit_halomodel = 'halomodel' halofit_casarini = 'casarini' halofit_mead2015 = 'mead2015' halofit_default = halofit_mead halofit_version_names = [halofit_original, halofit_bird, halofit_peacock, halofit_takahashi, halofit_mead, halofit_halomodel, halofit_casarini, halofit_mead2015]
[docs]@fortran_class class Halofit(NonLinearModel): """ Various specific approximate non-linear correction models based on HaloFit. """ _fields_ = [ ("halofit_version", c_int, {"names": halofit_version_names, "start": 1}), ("HMCode_A_baryon", c_double, "HMCode parameter A_baryon"), ("HMCode_eta_baryon", c_double, "HMCode parameter eta_baryon"), ] _fortran_class_module_ = 'NonLinear' _fortran_class_name_ = 'THalofit' def get_halofit_version(self): return self.halofit_version
[docs] def set_params(self, halofit_version=halofit_default, HMCode_A_baryon=3.13, HMCode_eta_baryon=0.603): """ Set the halofit model for non-linear corrections. :param halofit_version: One of - original: `astro-ph/0207664 <>`_ - bird: `arXiv:1109.4416 <>`_ - peacock: `Peacock fit <>`_ - takahashi: `arXiv:1208.2701 <>`_ - mead: HMCode `arXiv:1602.02154 <>`_ - halomodel: basic halomodel - casarini: PKequal `arXiv:0810.0190 <>`_, `arXiv:1601.07230 <>`_ - mead2015: original 2015 version of HMCode `arXiv:1505.07833 <>`_ :param HMCode_A_baryon: HMCode parameter A_baryon. Default 3.13. :param HMCode_eta_baryon: HMCode parameter eta_baryon. Default 0.603. """ self.halofit_version = halofit_version self.HMCode_A_baryon = HMCode_A_baryon self.HMCode_eta_baryon = HMCode_eta_baryon
[docs]@fortran_class class SecondOrderPK(NonLinearModel): """ Third-order Newtonian perturbation theory results for the non-linear correction. Only intended for use at very high redshift (z>10) where corrections are perturbative, it will not give sensible results at low redshift. See Appendix F of `astro-ph/0702600 <>`_ for equations and references. Not intended for production use, it's mainly to serve as an example alternative non-linear model implementation. """ _fortran_class_module_ = 'SecondOrderPK' _fortran_class_name_ = 'TSecondOrderPK' def set_params(self): pass