fruitbat.cosmology

Module for defining different cosmologies

fruitbat.cosmology.WMAP5()

WMAP5 instance of FlatLambdaCDM cosmology

(from Komatsu et al. 2009, ApJS, 180, 330, doi: 10.1088/0067-0049/180/2/330. Table 1 (WMAP + BAO + SN ML).)

fruitbat.cosmology.WMAP7()

WMAP7 instance of FlatLambdaCDM cosmology

(from Komatsu et al. 2011, ApJS, 192, 18, doi: 10.1088/0067-0049/192/2/18. Table 1 (WMAP + BAO + H0 ML).)

fruitbat.cosmology.WMAP9()

WMAP9 instance of FlatLambdaCDM cosmology

(from Hinshaw et al. 2013, ApJS, 208, 19, doi: 10.1088/0067-0049/208/2/19. Table 4 (WMAP9 + eCMB + BAO + H0, last column))

fruitbat.cosmology.Planck13()

Planck13 instance of FlatLambdaCDM cosmology

(from Planck Collaboration 2014, A&A, 571, A16 (Paper XVI), Table 5 (Planck + WP + highL + BAO))

fruitbat.cosmology.Planck15()

Planck15 instance of FlatLambdaCDM cosmology

(from Planck Collaboration 2016, A&A, 594, A13 (Paper XIII), Table 4 (TT, TE, EE + lowP + lensing + ext))

fruitbat.cosmology.Planck18()

Planck18 instance of FlatLambdaCDM cosmology

(from Planck 2018 results. VI. Cosmological Parameters, A&A, submitted, Table 2 (TT, TE, EE + lowE + lensing + BAO))

fruitbat.cosmology.create_cosmology(parameters=None, name=None)

A wrapper to create custom astropy cosmologies.

The only avaliable cosmology types in this method are: FlatLambdaCDM, FlatwCDM, LambdaCDM and wCDM. See astropy.cosmology for more details on these types of cosmologies. To create a cosmology of a type that isn’t listed above, it will have to be created directly using astropy.cosmology.

Parameters:

• parameters (dict or None) – A dictionary containing the cosmological parameters. The names of the parameters must conform to the same format as the parameters used in astropy.cosmology. If parameters is None then default values for each parameter is used.
• name (str or None, optional) –
• name of the cosmology. Default (The) –

Returns:

Return type:

cosmology

Notes

Default parameter values:

params = {'H0': 70, 'Om0': 0.3, 'Oc0': 0.26, 'Ob0': 0.04, 'Neff': 3.04,
          'flat': True, 'Tcmb0': 0.0, 'm_nu': 0.0, 'w0': -1}

If 'flat' is set to False then a value of 'Ode0' (current dark energy density) should be specified.

fruitbat.cosmology.builtin()

Create a dictionary of the builtin cosmologies with keywords and functions.

Returns:A dictionary containing the keywords and function for each cosmology. Return type:dict

fruitbat.cosmology.keys()

Returns a string constaining all the keywords for builtin cosmologies.