pynbody.analysis.halo

Functions for calculating crucial properties of halos, such as their center, shape, and virial radius.

Also contains functions for transforming the simulation so that a given halo is centered.

Functions

center(sim[, mode, return_cen, ...])	Transform the ancestor snapshot so that the provided snapshot is centred
halo_shape(sim[, N, rin, rout, bins])	Deprecated wrapper around shape(), for backwards compatibility.
hybrid_center(sim[, r])	Determine the center of the halo by finding the shrink-sphere-center near the potential minimum
shape(sim[, nbins, rmin, rmax, bins, ndim, ...])	Calculates the shape of the provided particles in homeoidal shells, over a range of nbins radii.
shrink_sphere_center(sim[, r, ...])	Return the center according to the shrinking-sphere method of Power et al (2003)
vel_center(sim[, cen_size, return_cen, move_all])	Recenter the snapshot on the center of mass velocity inside a sphere of specified radius
virial_radius(sim[, cen, overden, r_max, ...])	Calculate the virial radius of the halo centered on the given coordinates.