disky_const.py

'''
J Matthews, 21/02
This is a file containing useful constants for python coding

Units in CGS unless stated
'''

import numpy

C=29979245800.0
VERY_BIG = 1e50
H = 6.6262e-27
HC = 1.98587e-16
HEV = 4.13620e-15                # Planck's constant in eV 
HRYD = 3.04005e-16          # NSH 1204 Planck's constant in Rydberg 
G = 6.670e-8
BOLTZMANN = 1.38062e-16
WIEN =        5.879e10            # NSH 1208 Wien Disp Const in frequency units 
H_OVER_K = 4.799437e-11
STEFAN_BOLTZMANN = 5.6696e-5
THOMPSON = 0.66524e-24
PI  =        3.1415927
MELEC =        9.10956e-28
E=        4.8035e-10                                # Electric charge in esu 
MPROT =        1.672661e-24
MSOL =        1.989e33
RSOL = 6.995e10
LSOL = 3.839e33             # erg/s
P =        3.08e18
YR   =        3.1556925e7
PI_E2_OVER_MC = 0.02655103        # Classical cross-section 
PI_E2_OVER_M  = 7.96e8
ALPHA =        7.297351e-3                        # Fine structure constant 
BOHR =        0.529175e-8                        # Bohr radius 
CR =        3.288051e15                                #Rydberg frequency for H != Ryd freq for infinite mass 
ANGSTROM  = 1.e-8           #Definition of an Angstrom in units of this code, e.g. cm 
EV2ERGS   = 1.602192e-12
RADIAN =        57.29578
RYD2ERGS = 2.1798741e-11
RYDBERGTOEV = 13.60569253
ECS_CONSTANT = 4.773691e16
PARSEC = 3.086E18
A21_CONSTANT = 7.429297e-22
YEAR = 3.15569e7                        # number of seconds in a year