All physical constants used in the code are defined in this module. We include values both in SI units and in cgs units for convenience. All values are taken from the NRL Plasma Formulary.
| Type | Visibility | Attributes | Name | Initial | |||
|---|---|---|---|---|---|---|---|
| real(kind=dp), | public, | parameter | :: | dpi | = | 3.141592653589793238462643383279d0 | value for pi |
| real(kind=dp), | public, | parameter | :: | coulomb_log | = | 22.0d0 | coulomb logarithm |
| real(kind=dp), | public, | parameter | :: | mp_cgs | = | 1.672621777d-24 | proton mass in g |
| real(kind=dp), | public, | parameter | :: | mp_si | = | 1.672621777d-27 | proton mass in kg |
| real(kind=dp), | public, | parameter | :: | mH_cgs | = | 1.6733d-24 | hydrogen mass in g |
| real(kind=dp), | public, | parameter | :: | mH_si | = | 1.6733d-27 | hydrogen mass in kg |
| real(kind=dp), | public, | parameter | :: | me_cgs | = | 9.1094d-28 | electron mass in g |
| real(kind=dp), | public, | parameter | :: | me_si | = | 9.1094d-31 | electron mass in kg |
| real(kind=dp), | public, | parameter | :: | ec_cgs | = | 4.8032d-10 | elementary charge in statcoul |
| real(kind=dp), | public, | parameter | :: | ec_si | = | 1.6022d-19 | elementary charge in C |
| real(kind=dp), | public, | parameter | :: | kB_cgs | = | 1.3806488d-16 | Boltzmann constant in erg/K |
| real(kind=dp), | public, | parameter | :: | kB_si | = | 1.3806488d-23 | Boltzmann constant in J/K |
| real(kind=dp), | public, | parameter | :: | mu0_si | = | 1.2566370614d-6 | magnetic constant in H/m |
| real(kind=dp), | public, | parameter | :: | mu0_cgs | = | 4.0d0*dpi | magnetic constant |
| real(kind=dp), | public, | parameter | :: | e0_si | = | 8.8542d-12 | permittivity of free space in F/m |
| real(kind=dp), | public, | parameter | :: | Z_ion | = | 1.0d0 | degree of ionization (assumed fully ionized) |
| real(kind=dp), | public, | parameter | :: | R_si | = | 8.3145d0 | gas constant in J/K |
| real(kind=dp), | public, | parameter | :: | R_cgs | = | 8.3145d7 | gas constant in erg/deg Solar physics parameters |
| real(kind=dp), | public, | parameter | :: | msun_cgs | = | 1.99d33 | solar mass in g |
| real(kind=dp), | public, | parameter | :: | Rsun_cgs | = | 6.96d10 | solar radius in cm |
| real(kind=dp), | public, | parameter | :: | gsun_cgs | = | 2.74d4 | solar gravity in cm/s^2 |
| real(kind=dp), | public, | parameter | :: | Vesc_sun | = | 6.18d7 | solar escape velocity in cm/s |
| real(kind=dp), | public, | parameter | :: | Teff_sun | = | 5770.0d0 | solar effective temperature in K |
| real(kind=dp), | public, | parameter | :: | Lsun_cgs | = | 3.83d33 | solar luminosity in erg/s |
| real(kind=dp), | public, | parameter | :: | AU_cgs | = | 1.50d13 | astronomical unit in cm |
| real(kind=dp), | public, | parameter | :: | fsun_cgs | = | 1.36d6 | solar constant (intensity at 1 AU) in erg/cm^2/s |
| real(kind=dp), | public, | parameter | :: | tc_pf_kappa_para | = | 1.8d-5 | coefficient of parallel thermal conduction in erg*s/cm/K the coulomb logarithm ln(Lambda) has not yet been included |
| real(kind=dp), | public, | parameter | :: | tc_pf_kappa_perp | = | 8.2d-13 | coefficient of perpendicular thermal conduction in erg*s/cm/K the coulomb logarithm ln(Lambda) has not yet been included |