Class
NumCosmoXcorKernelComponent
Description [src]
abstract class NumCosmo.XcorKernelComponent : GObject.Object
{
/* No available fields */
}Abstract base class for kernel components in cross-correlation calculations.
This class provides a framework for defining physical components of cross-correlation kernels. Each component represents a distinct physical contribution, such as galaxy number counts, magnification bias, or ISW effect. Components can be combined to form multi-component kernels.
Subclasses must implement:
- eval_kernel: evaluates K(k, xi) for the component
- eval_prefactor: evaluates any k and $\ell$-dependent prefactor
Optionally, subclasses can implement:
- get_limits: returns valid integration ranges for xi and k
The class provides automatic kernel analysis functionality that studies the behavior of KL(k, y/k) using the Limber approximation to optimize integration strategies.
Instance methods
nc_xcor_kernel_component_eval_KL_max
Evaluates the maximum value of KL(k, y/k) at the given y value from kernel analysis using the Limber approximation KL = sqrt(π/(2*y)) * K(y/k, k) / k. This is the value of KL at k = k_max(y).
nc_xcor_kernel_component_eval_k_epsilon
Evaluates k_epsilon at the given y value from kernel analysis, where k_epsilon is the value of k (beyond k_max) where KL(k, y/k) drops to epsilon times KL_max.
nc_xcor_kernel_component_eval_k_max
Evaluates k_max at the given y value from kernel analysis, where k_max is the value of k that maximizes KL(k, y/k) for this y.
nc_xcor_kernel_component_free
Decreases the reference count of comp by one. If the reference count
reaches zero, the object is freed.
nc_xcor_kernel_component_prepare
Prepares the kernel component by analyzing its behavior over the valid ranges. This method calls get_limits to obtain the integration ranges, then studies KL(k, y/k) using the Limber approximation to compute k_max(y), KL_max(y), and k_epsilon(y) using GSL Brent minimizer and root finder with warm starts.
nc_xcor_kernel_component_set_epsilon
Sets the epsilon value used in kernel analysis to determine where KL(k, y/k) drops to epsilon * KL_max.
nc_xcor_kernel_component_set_max_iter
Sets the maximum number of iterations for GSL minimizer and root finder.
Properties
NumCosmo.XcorKernelComponent:epsilon
The epsilon value for kernel analysis, determining where KL(k, y/k) drops to epsilon * KL_max.
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.
Class structure
struct NumCosmoXcorKernelComponentClass {
/* no available fields */
}No description available.
Virtual methods
NumCosmo.XcorKernelComponentClass.eval_kernel
Evaluates the kernel function K(k, xi) for this component.
NumCosmo.XcorKernelComponentClass.eval_prefactor
Evaluates the prefactor that may depend on k and ell.