popsynth.distributions.uniform_distribution module

class popsynth.distributions.uniform_distribution.LogUniLuminiosityDistribution(seed: int = 1234, name: str = 'logunilum')

Bases: LuminosityDistribution

Lmin

Lmax

__init__(seed: int = 1234, name: str = 'logunilum')

A broken power law luminosity distribution.

L ~ L^``alpha`` for L <= Lbreak L ~ L^``beta`` for L > Lbreak

Parameters

• seed (int) – Random seed

• name (str) – Name of the distribution

• Lmin (DistributionParameter) – Minimum value of the luminosity

• Lmax (DistributionParameter) – Maximum value of the luminosity

phi(L)

The functional form of the distribution. not required for sampling :param luminosity: Luminosity

draw_luminosity(size=1)

function to draw the luminosity via an alternative method must be implemented in child class

Parameters

size –

Returns

class popsynth.distributions.uniform_distribution.UniformCosmoDistribution(seed: int = 1234, name: str = 'uniform_cosmo', is_rate: bool = True)

Bases: CosmologicalDistribution

r0

zmin

zmax

__init__(seed: int = 1234, name: str = 'uniform_cosmo', is_rate: bool = True)

A cosmological distribution where the density evolves uniformly.

Lambda (1+z)^``delta``

Parameters

• seed (int) – Random seed

• name (str) – Name of the distribution

• is_rate (bool) – True if modelling a population of transient events, False if modelling a population of steady-state objects. Affects the time_adjustment method used in cosmo calculations. Default is True.

• Lambda (DistributionParameter) – The local density in units of Gpc^-3

• delta (DistributionParameter) – The index of the power law

dNdV(distance)

The differential number of objects per volume element

Parameters

distance –

Returns