""" Provide a consistent set of constants to use through clevar """
from enum import Enum
import numpy as np
import astropy.constants as astropyconst
import astropy.units as u
[docs]class Constants(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 = CLIGHT*1.0e-3
""" Speed of light (km/s)
Source: CODATA 2018
"""
GNEWT = 6.67430e-11
""" Newton's constant (m^3/kg/s^2)
Source: CODATA 2018
"""
PC_TO_METER = 3.085677581491367e16
""" parsec to meter (m)
Source: IAU 2015
"""
GNEWT_SOLAR_MASS = 1.3271244e20
""" G x Solar mass (m^3/s^2)
Source: IAU 2015
"""
SOLAR_MASS = GNEWT_SOLAR_MASS/GNEWT
""" Solar mass (kg)
Source: IAU 2015/CODATA 2018
"""
RHOCRIT = 3.0*1e10*(PC_TO_METER*1.0e6)/(8.0*np.pi*GNEWT_SOLAR_MASS)
""" Critical density of the universe (Msun/Mpc^3/h^2)
Source: IAU 2015/CODATA 2018
"""