An anomalous value for the ratio of mass to this was found when the virial theorem was applied to the Coma cluster by Zwicky.
The function denoted by this term is well approximated by the Schechter function. An anomalous value for the ratio of mass to this was found when the virial theorem was applied to the Coma cluster by Zwicky. This quantity can be found from the formula four times pi times the square of stellar radius times the fourth power of effective temperature times the Stefan-Boltzmann constant. This quantity is be related to velocity dispersion of elliptical galaxies and the amplitude of the rotation curve of spiral galaxies in the Faber-Jackson and Tully-Fisher relationships. Henrietta Leavitt elucidated the relationship between this quantity and the period of Cepheid variables. For 10 points, identify this intrinsic or absolute brightness of an astronomical object.
The function denoted by this term is well approximated by the Schechter function.
luminosity [prompt on light or absolute magnitude or absolute brightness]