NumCosmoGalaxyShapePopBeta

Computes the per-component intrinsic RMS ellipticity $e_\mathrm{rms} = \sqrt{\langle |\chi_I|^2 \rangle / 2}$ implied by data.

Evaluates the normalized density $P(x)$ of the squared intrinsic ellipticity modulus, reading the resolved parameters from data (no live parameter access).

Evaluates the same density as nc_galaxy_shape_pop_eval_p(), but parameterized directly by $\rho^2$ instead of $x$. The default implementation just substitutes $x=\rho^2/(1+\rho^2)$ into eval_p(); a subclass overrides it only when its density has a genuinely more direct or better-conditioned form in $\rho^2$ (see NcGalaxyShapePopBeta, whose density is a rational power of $\rho^2$ with no need to ever form $1-x$ by subtraction). Intended for calculators that already work in $(u,v)$ via a disc-compactifying substitution (e.g. NcGalaxyShapeFactorQuad), where $\rho^2$ is the natural coordinate.

Taylor-in-$g$ analog of nc_galaxy_shape_pop_eval_p(): composes this population’s own fully normalized density with the (already computed, population-independent) shear-map series $x(g)$, order by order in $g$. There is no generic default — every subclass used with NcGalaxyShapeFactorSeriesLensed must provide its own implementation; the base class errors clearly otherwise.

Decreases the reference count of gsp by one.

Samples an intrinsic ellipticity $\chi_I = e_1 + i e_2$ from data.

Gets the mode of $x=|\chi_I|^2$ for this galaxy’s resolved population density, i.e. where $P(x)$ peaks. This is a per-data capability (data->ldata_get_mode_x), not a virtual method, mirroring nc_galaxy_shape_pop_get_sigma(); unlike that capability, 0 is always a meaningful default (the model is assumed radially symmetric about $\chi_I=0$ unless it says otherwise), so this never errors.

Gets the (untruncated) Gaussian width sigma resolved for this galaxy, for models that parameterize their density this way (the Gauss family, Global or per-galaxy). This is a per-data capability (data->ldata_get_sigma), not a virtual method: any concrete model sharing the same internal representation can populate it, regardless of its position in the class hierarchy.

Resolves the model parameters (and the per-galaxy data->e_rms, for per-galaxy models) into data: the subclass-specific parameters stored in data->ldata that nc_galaxy_shape_pop_eval_p() / nc_galaxy_shape_pop_eval_p_rho2() read.

Increases the reference count of gsp by one.

Please see NcmModel for a full list of methods.

Please see GObject for a full list of methods.