This astrophysical value is normally symbolized as an uppercase upsilon.
Determining this quantity for a system can be done using only the core velocity dispersion if one uses King's method, also known as core  tting. By using the virial equation for an elliptical galaxy, this value is derived to be velocity dispersion squared over pi times big G times the size of the galaxy times the surface brightness. This astrophysical value is normally symbolized as an uppercase upsilon. The proposal of dark matter by Fritz Zwicky actually stemmed from his observation that this value differed by a couple orders of magnitude between the Coma cluster and the Kapteyn system. For 10 points, what value is represented for the sun as M-sub-dot-in-a-circle over L-sub-dot-in-a-circle and is equal to about 5,133 kilograms per watt?
Determining this quantity for a system can be done using only the core velocity dispersion if one uses King's method, also known as core  tting.
mass-to-light ratio [or mass-to-luminosity ratio]