| Constant | Value | Unit | Reference |
|---|---|---|---|
| G: gravitational Constant | 6.67e-8 | ||
| h: Planck Constant | 6.62e-27 | ||
| h: Hubble Constant | 0.6732 | 100 km/s/Mpc | [[Planck+2018.pdf]] |
| c: speed of light | 2.9979e10 | ||
| kb: | 1.38e-16 | ||
| mp: proton mass | 1.673e-24 | ||
| mn: neutron mass | 1.675e-24 | ||
| me: electron mass | 9.109e-28 | ||
| sigma_T: Thomson cross section | 6.652e-25 | ||
| sigma_SB: Stefan Boltzmann Constant | 5.67e-5 | ||
| a: radiation constant | 4*sigma_SB/c | ||
| Kappa_es: electron scattering opacity | 0.35 | ||
| Msolar: solar mass | 1.99e33 | ||
| Lsolar: Solar luminosity | 3.827e33 | ||
| Rsolar: Solar Radius | 6.960e10 | ||
| AU: Astronomical Unit | 1.496e13 | ||
| Mpc: | 3.0856776e24 | ||
| year: | 3.15576e7 | ||
| pc: | 3.0856776e18 | ||
| keV_in_K: | 11604525.00617 | ||
| eV_in_K: | keV_in_K/1000 | ||
| eV_in_erg | keV_in_K * kb /1000 | ||
| keV_in_erg | eV_in_erg * 1000 | ||
| pi: | 3.14159 | ||
| kms: | 100000 | ||
| mue: mean electron weight | 1.154 | ||
| mu: mean molecular weight | 0.6 |