SOME CONSTANTS USED IN ASTROPHYSICS

APPENDIX

SOME CONSTANTS USED IN ASTROPHYSICS 2.997924-10 lo cms- 1 6.626176-10"27ergs 1.380622·lO"16 erg K- 1 6.6720-10- 8 cm 3 g- 1 s- 2 4.803248 · 10 " 10 esu 9.10953410"28 g 1.672648·10"24 g 1.660565 ·10" 24 g 5.67032Ί0-5 erg cm"2 s"1 K"4 6.652453·lO"25 cm2 1.4960-1013cm 3.0856· 1018 cm 9.4605-1017 cm 1.989 10" g 6.9598 ·1010 cm 3.90-10 33 ergs- x

Speed of light c Planck constant h=2nh Boltzmann constant k Gravitational constant G Electron charge e Electron mass me Proton mass mp Atomic mass unit Stefan-Boltzmann constant σ Thomson cross-section στ Astronomical unit Parsec pc Light year Solar mass MQ Solar radius R0 Solar luminosity

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