synthesizer.load_data.utils

Utilities for data loading methods

Functions

synthesizer.load_data.utils.age_lookup_table(cosmo, redshift=0.0, delta_a=0.001, low_lim=0.0001)[source]

Create a look-up table for age as a function of scale factor.

Defaults to start at the lower resolution limit (delta_a), and proceeds in steps of delta-a until the scale factor given by the input redshift minus the low_lim.

Parameters:

  • cosmo (astropy.cosmology) – astropy cosmology object

  • redshift (float) – redshift of the snapshot

  • delta_a (int) – scale factor resolution to approximate

  • low_lim (float) – lower limit of scale factor

Returns:

scale_factor (array)

array of scale factors

age (array)

array of ages (Gyr)

Examples using synthesizer.load_data.utils.age_lookup_table

Age lookup test

Age lookup test
synthesizer.load_data.utils.get_len(Length)[source]

Find the beginning and ending indices from a length array

Parameters:

Length (array) – array of number of particles

Returns:

begin (array)

beginning indices

end (array)

ending indices

synthesizer.load_data.utils.lookup_age(scale_factor, scale_factors, ages)[source]

Look up the age given a scale factor

Parameters:

  • scale_factor (array.float) – scale factors to convert to ages

  • scale_factors (array) – array of lookup scale factors

  • ages (array) – array of lookup ages

Returns:

age (float)

age of galaxy

Examples using synthesizer.load_data.utils.lookup_age

Age lookup test

Age lookup test