Cosmo¶

class Cosmo(units=None, Omega_m=None, Omega_l=None, Omega_k=None, H_0=None, steps_DC=None, steps_dVC=None)[source]¶

Bases: object

This class sets-up a cosmological framework to evalute comosmological distances and volume. Calculations are done following Hogg 1999

Parameters:	units – (str), units for distances “cm”, or “Gpc”, or “Mpc” Omega_m – (float), if not provided taken from BlazarSED code value Omega_l – (float), if not provided taken from BlazarSED code value Omega_k – (float), if not provided taken from BlazarSED code value

Methods Summary

DA(z)	evaluates the angular distance
DC(z)	evaluates the comoving (line-of-sight) distance
DL(z)	evaluates the luminosity distance
DM(z)	evaluates the comoving (transverse) distance
EZ(z)
VC(z2[, z1])	evaluates the comoving volume in a spehrical shell between z1 and z2
four_pi_dVC(z)
show()	shows the set-up of the comological framework

Methods Documentation

DA(z)[source]¶

evaluates the angular distance

Parameters:	z – (float) redhsift
Returns:	angular distance

DC(z)[source]¶

evaluates the comoving (line-of-sight) distance

Parameters:	z – (float) redhsift
Returns:	comoving (line-of-sight) distance

DL(z)[source]¶

evaluates the luminosity distance

Parameters:	z – (float) redhsift
Returns:	luminosity distance

DM(z)[source]¶

evaluates the comoving (transverse) distance

Parameters:	z – (float) redhsift
Returns:	comoving (transverse) distance

EZ(z)[source]¶

VC(z2, z1=None)[source]¶

evaluates the comoving volume in a spehrical shell between z1 and z2

Parameters:	z2 – (float) redhsift z1 – (float) redhsift, optional, if not provided the returned volume will be the sphere with a z=z2
Returns:	comoving volume

four_pi_dVC(z)[source]¶

show()[source]¶

shows the set-up of the comological framework