The density of this quantity for a disk is often modelled using an exponential times a hyperbolic secant squared function. For objects on the main sequence, this quantity is related to the mass by a 3.9-degree power law. Taking four pi G M c times the mass of the photon, all over the Thompson scattering cross section, gives an upper bound for it, near which objects have strong radiation-driven winds. Henrietta Leavitt discovered a relationship between this quantity and period for Cephied variables, allowing them to be used as standard candles. It is bound by the Edding
The density of this quantity for a disk is often modelled using an exponential times a hyperbolic secant squared function. For objects on the main sequence, this quantity is related to the mass by a 3.9-degree power law. Taking four pi G M c times the mass of the photon, all over the Thompson scattering cross section, gives an upper bound for it, near which objects have strong radiation-driven winds. Henrietta Leavitt discovered a relationship between this quantity and period for Cephied variables, allowing them to be used as standard candles. It is bound by the Eddington limit and varies as the fourth power of temperature according to an application of the Stefan-Boltzmann equation. For 10 points, name this measure of a stellar object that is the energy emitted during a unit of time.
The density of this quantity for a disk is often modelled using an exponential times a hyperbolic secant squared function.