classylss.astropy_compat module¶

class classylss.astropy_compat.AstropyCompat(engine)[source]¶

Bases: object

A cosmology wrapper object that provides compatibility with the syntax from astropy.

Warning

Some parameter definitions vary between astropy and CLASS.

Parameters:	engine (ClassEngine) – the CLASS engine object

Attributes

`Ob0`	Returns `Omega0_b`.
`Ode0`	Returns the sum of `Omega0_lambda` and `Omega0_fld`.
`Odm0`	Returns `Omega0_cdm`.
`Ogamma0`	Returns `Omega0_g`.
`Ok0`	Returns `Omega0_k`.
`Om0`	Returns `Omega0_m`.
`Onu0`	Returns the sum of `Omega0_ncdm_tot` and `Omega0_ur`.
`Tcmb0`	Returns `T0_cmb`.
`Tnu0`	Returns `T0_ncdm`.
`has_massive_nu`	Returns `True` if `N_ncdm` is greater than zero.
`w0`	Returns `w0_fld`.
`wa`	Returns `wa_fld`.

Methods

`Ob`(z)	Returns `Omega_b()`.
`Ode`(z)	Returns the sum of `Omega_lambda()` and `Omega_fld()`.
`Odm`(z)	Returns `Omega_cdm()`.
`Ogamma`(z)	Returns `Omega_g()`.
`Ok`(z)	Returns `Omega_k()`.
`Om`(z)	Returns `Omega_m()`.
`Onu`(z)	Returns the sum of `Omega_ncdm()` and `Omega_ur()`.
`Tcmb`(z)	Returns \((1+z)\) `T0_cmb`.
`Tnu`(z)	Returns \((1+z)\) `T0_ncdm`.
`nu_relative_density`(z)	Returns `Onu()` / `Ogamma()`.

Ob(z)[source]¶: Returns Omega_b().

Ob0¶: Returns Omega0_b.

Ode(z)[source]¶: Returns the sum of Omega_lambda() and Omega_fld().

Ode0¶: Returns the sum of Omega0_lambda and Omega0_fld.

Odm(z)[source]¶: Returns Omega_cdm().

Odm0¶: Returns Omega0_cdm.

Ogamma(z)[source]¶: Returns Omega_g().

Ogamma0¶: Returns Omega0_g.

Ok(z)[source]¶: Returns Omega_k().

Ok0¶: Returns Omega0_k.

Om(z)[source]¶: Returns Omega_m().

Om0¶: Returns Omega0_m.

Onu(z)[source]¶: Returns the sum of Omega_ncdm() and Omega_ur().

Onu0¶: Returns the sum of Omega0_ncdm_tot and Omega0_ur.

Tcmb(z)[source]¶: Returns \((1+z)\) T0_cmb.

Tcmb0¶: Returns T0_cmb.

Tnu(z)[source]¶: Returns \((1+z)\) T0_ncdm.

Tnu0¶: Returns T0_ncdm.

has_massive_nu¶: Returns True if N_ncdm is greater than zero.

nu_relative_density(z)[source]¶: Returns Onu() / Ogamma().

w0¶: Returns w0_fld.

wa¶: Returns wa_fld.