#!/usr/bin/env python3
"""
constants.py - Constants in cgs units.

15Jun18 - Abel Flores Prieto
"""

from numpy import pi

c = 2.99792458e10  # cm/s
G = 6.6741e-8  # cm^3/g/s^2
h = 6.6261e-27  # erg*s
h_bar = h / (2. * pi)
k = 1.3807e-16  # erg/K
Ry = 2.1799e-11  # erg this is 1Ry = 13.6eV ionization energy for hydrogen
kai_I = 3.9398e-11  # erg this is 24.587eV for first ionization energy of He
kai_II = 8.7184e-11  # erg this is 54.416eV for second ionization energy of He
m_e = 9.1094e-28  # grams
m_p = 1.6726e-24  # grams
m_H = 1.6749e-24  # grams
m_He = 6.6465e-24  # grams
e = 4.8032e-10  # franklin (or statcoulomb)
ev_erg = 1.60218e-12  # 1ev to erg
