DEV add CGS-SI unit conversion factors.

Author: eilifso

src/constants.jl

@@ -23,6 +23,7 @@ const m_e = 9.1093837015e-31 # Kg ........................ Electron mass
 const m_p = 1.67262192369e-27 # Kg ......................... Proton mass
 
 # CGS units
+const c_cgs = 1e2c # cm/s
 const k_B_cgs = 1.380649e-16 # erg/K
 const e_cgs = 4.8032047e-10 # statcoulombs
 const m_e_cgs = m_e * 1e3 # grams
@@ -34,3 +35,12 @@ const csqrdinv = 1 / csqrd # s^2 m^-2 ........ Inverse of the light speed square
 
 # Unit conversion
 const J2eV = 6.24150907e18 # 1 J * 6.24e12 eV/J........................energy
+const si2cgs_mass = 1e3
+const si2cgs_numberdensity = 1e-6
+const si2cgs_velocity = 1e2
+const si2cgs_charge = 1e-1c_cgs # = 2.99792458e9.  C => statC
+const si2cgs_electriccurrent = 1e-1c_cgs # - 2.99792458e9. A => StatC/s = StatA
+const si2cgs_currentdensity = 1e-5c_cgs # = 2.99792458e5. A/m^2 => StatA/cm^2
+const si2cgs_electricfield = 1e6 / c_cgs # 3.33564095e-5. V/m => StatV/cm
+const cgs2si_electricfield = 1/si2cgs_electricfield # = 2.99792458e4. To V/m
+const cgs2si_velocity = 1e-2