__all__ = ("HaloBiasBhattacharya11",)
from . import HaloBias, get_delta_c
[docs]class HaloBiasBhattacharya11(HaloBias):
""" Implements halo bias as described in `Bhattacharya et al. 2011
<https://arxiv.org/abs/1005.2239>`_. This parametrization is only
valid for 'fof' masses.
Args:
mass_def (:class:`~pyccl.halos.massdef.MassDef` or :obj:`str`):
a mass definition object, or a name string.
mass_def_strict (:obj:`bool`): if ``False``, consistency of the mass
definition will be ignored.
"""
name = "Bhattacharya11"
def __init__(self, *,
mass_def="fof",
mass_def_strict=True):
super().__init__(mass_def=mass_def, mass_def_strict=mass_def_strict)
def _check_mass_def_strict(self, mass_def):
return mass_def.Delta != "fof"
def _setup(self):
self.a = 0.788
self.az = 0.01
self.p = 0.807
self.q = 1.795
self.dc = get_delta_c(None, None, kind='EdS')
def _get_bsigma(self, cosmo, sigM, a):
nu = self.dc / sigM
a = self.a * a**self.az
anu2 = a * nu**2
return 1 + (anu2 - self.q + 2*self.p / (1 + anu2**self.p)) / self.dc