Class
NumCosmoMultiplicityFuncCastro
Description [src]
final class NumCosmo.MultiplicityFuncCastro : NumCosmo.MultiplicityFunc
{
/* No available fields */
}Dark matter halo — Castro multiplicity function.
Non-universal multiplicity function calibrated on spherical-overdensity virial
masses. Unlike the universal fits, its shape parameters depend on the local slope
of the variance, $\mathrm{d}\ln\sigma_R/\mathrm{d}\ln R$, and on $\Omega_m(z)$, so
the object needs the filtered power spectrum in addition to $\sigma_R$ itself; see
nc_multiplicity_func_set_psf(). A NcHaloMassFunction injects its own filter automatically.
Two calibrations are available through the NcMultiplicityFuncCastro:model
property. They share the whole coefficient structure but are distinct fits, so
the dynamical dark energy one does not reduce to the other when its dark energy
term vanishes. Both amplitudes are exact normalisations, $\int f(\nu)\,
\mathrm{d}\nu/\nu = 1$.
See the Castro Halo Mass Function and Bias theory page for the full expressions, and Castro et al. (2023) and Castro et al. (2025).
Constructors
nc_multiplicity_func_castro_new
Creates a new NcMultiplicityFuncCastro with the Castro et al. (2023)
calibration and ROCKSTAR parameters.
nc_multiplicity_func_castro_new_full
Creates a new NcMultiplicityFuncCastro using model and halo_finder.
Functions
nc_multiplicity_func_castro_clear
Atomically decrements the reference count of mc by one. If the reference count
drops to 0, all memory allocated by mc is released. Set the pointer to NULL.
Instance methods
nc_multiplicity_func_castro_delta_c
Linear collapse threshold $\delta_c(\Omega_m(z))$ following Kitayama & Suto (1996), as used by the Castro calibrations.
nc_multiplicity_func_castro_eval_full
Evaluates the multiplicity function with the slope supplied directly instead of
taken from the filter. The model is a closed-form function of sigma,
dlnsigma_dlnR and the background at z, so this is the whole of it: no filter is
consulted and no interpolation is involved.
nc_multiplicity_func_castro_eval_lnf
Logarithm of the multiplicity function, computed without ever forming the function itself.
nc_multiplicity_func_castro_free
Atomically decrements the reference count of mc by one. If the reference count
drops to 0, all memory allocated by mc is released.
nc_multiplicity_func_castro_set_halo_finder
Sets the halo finder whose best-fit parameters are used. Ignored by
NC_MULTIPLICITY_FUNC_CASTRO_MODEL_C25, which has a single parameter set.
nc_multiplicity_func_castro_z_ta
Turn-around redshift for a halo collapsing at z, in the Einstein-de Sitter
approximation used by the calibration, $1 + z_\mathrm{ta} = (1+z)\,2^{2/3}$.
Methods inherited from NcMultiplicityFunc (11)
nc_multiplicity_func_correction_factor
Computes the correction factor for the multiplicity function. Some multiplicity functions require mass-dependent corrections.
nc_multiplicity_func_eval
Evaluates the multiplicity function $f(\sigma, z)$ at the given
variance sigma and redshift z. The filter radius lnR identifies the
scale at which sigma was evaluated; non-universal models use it to query
further properties of the filtered power spectrum, such as the slope
$\mathrm{d}\ln\sigma_R/\mathrm{d}\ln R$. Universal models ignore it.
nc_multiplicity_func_free
Atomically decrements the reference count of mulf by one. If the reference count drops to 0,
all memory allocated by mulf is released.
nc_multiplicity_func_get_Delta
Gets the Delta Value.
nc_multiplicity_func_get_matter_Delta
Gets the Delta Value with the matter density definition.
nc_multiplicity_func_get_mdef
Gets the mass definition.
nc_multiplicity_func_has_correction_factor
Checks if the multiplicity function has a correction factor, e.g., NcMultiplicityFuncBocquet (when using matter density).
nc_multiplicity_func_peek_psf
Gets the filtered power spectrum, or NULL when none was set.
nc_multiplicity_func_set_Delta
Sets the Delta for mean or matter mass definition to mdef.
nc_multiplicity_func_set_mdef
Sets the mass definition to mdef.
nc_multiplicity_func_set_psf
Sets the filtered power spectrum used by non-universal multiplicity functions.
It must be the same filter that provides the sigma passed to
nc_multiplicity_func_eval(), otherwise the two are evaluated on inconsistent
power spectra.
Properties
NumCosmo.MultiplicityFuncCastro:halo-finder
Halo finder whose best-fit parameters are used. Only
NC_MULTIPLICITY_FUNC_CASTRO_MODEL_C23 has per-finder calibrations; the
Castro et al. (2025) model provides a single parameter set and ignores this
property. See NcMultiplicityFuncCastroHaloFinder.
Properties inherited from NcMultiplicityFunc (3)
NumCosmo.MultiplicityFunc:Delta
NumCosmo.MultiplicityFunc:mass-def
It refers to the halo finder used to obtain the multiplicity function (e.g., SO and FoF), and
the background density $\rho_\mathrm{bg}$ used in the mass definition \eqref{eq:mrr}.
See the enumerator NcMultiplicityFuncMassDef for more details about the
background density definition.
NumCosmo.MultiplicityFunc:powerspectrum-filtered
The filtered power spectrum used to obtain quantities beyond $\sigma_R$ itself, such as the slope $\mathrm{d}\ln\sigma_R/\mathrm{d}\ln R$ required by non-universal multiplicity functions. Universal models leave it unset.
Signals
Signals inherited from GObject (1)
GObject::notify
The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.