halomod.hod.Zheng05

class halomod.hod.Zheng05(central: bool = False, cosmo=FlatLambdaCDM(name='Planck15', H0=<Quantity 67.74 km / (Mpc s)>, Om0=0.3075, Tcmb0=<Quantity 2.7255 K>, Neff=3.046, m_nu=<Quantity [0., 0., 0.06] eV>, Ob0=0.0486), cm_relation: ~halomod.concentration.CMRelation | None = None, profile: ~halomod.profiles.Profile | None = None, mdef: ~hmf.halos.mass_definitions.MassDefinition | None = <hmf.halos.mass_definitions.SOMean object>, **model_parameters)[source]

Bases: HODPoisson

Five-parameter model of Zheng (2005).

Parameters:

  • M_min (float, default = 11.6222) – Minimum mass of halo that supports a central galaxy

  • M_1 (float, default = 12.851) – Mass of a halo which on average contains 1 satellite

  • alpha (float, default = 1.049) – Index of power law for satellite galaxies

  • sig_logm (float, default = 0.26) – Width of smoothed cutoff

  • M_0 (float, default = 11.5047) – Minimum mass of halo containing satellites

References

[1]

Zheng, Z. et al., “Theoretical Models of the Halo Occupation Distribution: Separating Central and Satellite Galaxies “, https://ui.adsabs.harvard.edu/abs/2005ApJ…633..791Z.

central_condition_inherent = False
central_occupation(m)

The occupation function of the central component.

cs_pairs(m)

The average amount of the tracer coupled with itself in haloes of mass m, <T_c T_s>.

classmethod get_models() → Dict[str, Type]

Get a dictionary of all implemented models for this component.

property mmin

Minimum turnover mass for tracer.

nc(m)

Amplitude of central tracer per tracer source.

ns(m)

Amplitude of satellite tracer per tracer source.

satellite_occupation(m)

The occupation function of the satellite (or profile-dependent) component.

sharp_cut = False
sigma_central(m)

The standard deviation of the central tracer amount in haloes of mass m.

sigma_satellite(m)

The standard deviation of the satellite tracer amount in haloes of mass m.

ss_pairs(m)

The average amount of the tracer coupled with itself in haloes of mass m, <T_s T_s>.

total_occupation(m)

The total (average) occupation of the halo.

total_pair_function(m)

The total weight of the occupation paired with itself.

unit_conversion(cosmo, z)

A factor to convert the total occupation to a desired unit.