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sci.accretion-disk-luminosity Calculator
Calculates accretion disk luminosity, inner radius, and temperature profile for material infalling onto a compact object. Black hole accretion efficiency (η ≈ 0.06–0.42) exceeds nuclear fusion (η ≈ 0.007) by up to 60× — quasars emit more power than entire galaxies from a region the size of the solar system.
Inputs
Mass Accretion Msun Yr
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
Efficiency Eta
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
Mass Solar Masses
Total mass (kg). Distinct from weight — weight = mass × gravity. Mass is constant; weight varies with location.
Results
luminosity L (W)
Total power output of a star or light source in watts or solar luminosities. Relates to absolute magnitude.
luminosity L (L☉)
Total power output of a star or light source in watts or solar luminosities. Relates to absolute magnitude.
Eddington luminosity (L☉)
Total power output of a star or light source in watts or solar luminosities. Relates to absolute magnitude.
L/L_Edd
Reference formula or conversion factor shown for context.
L = η·Ṁ·c²
Reference formula or conversion factor shown for context.
quasar typical
Reference formula or conversion factor shown for context.