mass-to-luminosity ratio

mass-to-luminosity ratio

The mass of a system divided by its luminosity, usually expressed in solar units such that the mass-to-luminosity ratio of the Sun is one. Dark matter is required to bind systems that have a high mass-to-luminosity ratio, such as groups and clusters of galaxies.
References in periodicals archive ?
The visual mass is estimated based on luminosity measurements of galaxies with a given mass-to-luminosity ratio.
obtained mass-to-luminosity ratio is only about 3 or 4.