AssembiasTinker13Cens¶

class halotools.empirical_models.AssembiasTinker13Cens(threshold=10.5, prim_haloprop_key='halo_mvir', redshift=0.0, **kwargs)[source] [edit on github]

HOD-style model for a central galaxy occupation that derives from two distinct active/quiescent stellar-to-halo-mass relations.

Parameters: threshold : float, optional Stellar mass threshold of the mock galaxy sample in h=1 solar mass units. Default value is specified in the model_defaults module. prim_haloprop_key : string, optional String giving the column name of the primary halo property governing the occupation statistics of gal_type galaxies. Default value is specified in the model_defaults module. redshift : float, optional Redshift of the stellar-to-halo-mass relation. Default is set in sim_defaults. quiescent_fraction_abscissa : array, optional Values of the primary halo property at which the quiescent fraction is specified. Default is [10**12, 10**13.5, 10**15]. quiescent_fraction_ordinates : array, optional Values of the quiescent fraction when evaluated at the input abscissa. Default is [0.25, 0.7, 0.95] sec_haloprop_key : string, optional String giving the column name of the secondary halo property governing the assembly bias. Must be a key in the table passed to the methods of HeavisideAssembiasComponent. Default value is specified in the model_defaults module. split : float or list, optional Fraction or list of fractions between 0 and 1 defining how we split halos into two groupings based on their conditional secondary percentiles. Default is 0.5 for a constant 50/50 split. split_abscissa : list, optional Values of the primary halo property at which the halos are split as described above in the split argument. If loginterp is set to True (the default behavior), the interpolation will be done in the logarithm of the primary halo property. Default is to assume a constant 50/50 split. assembias_strength : float or list, optional Fraction or sequence of fractions between -1 and 1 defining the assembly bias correlation strength. Default is 0.5. assembias_strength_abscissa : list, optional Values of the primary halo property at which the assembly bias strength is specified. Default is to assume a constant strength of 0.5. If passing a list, the strength will interpreted at the input assembias_strength_abscissa. Default is to assume a constant strength of 0.5.