clevar.constants module

Provide a consistent set of constants to use through clevar

class clevar.constants.Constants(value)

Bases: enum.Enum

A set of constants for consistency throughout the code and dependencies.

CLIGHT = 299792458.0

Speed of light (m/s)

Source: CODATA 2018

CLIGHT_KMS = 299792.458

Speed of light (km/s)

Source: CODATA 2018

GNEWT = 6.6743e-11

Newton’s constant (m^3/kg/s^2)

Source: CODATA 2018

GNEWT_SOLAR_MASS = 1.3271244e+20

G x Solar mass (m^3/s^2)

Source: IAU 2015

PC_TO_METER = 3.085677581491367e+16

parsec to meter (m)

Source: IAU 2015

RHOCRIT = 277536627245.83075

Critical density of the universe (Msun/Mpc^3/h^2)

Source: IAU 2015/CODATA 2018

SOLAR_MASS = 1.988409870698051e+30

Solar mass (kg)

Source: IAU 2015/CODATA 2018