luminosity — English Dictionary

Noun

1. the state of being luminous, or a luminous object; brilliance or radiance

   Usage

   • Uncountable

   Examples

   They reported encountering a luminosity of great intensity and loving angelic beings.

2. the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor

   Usage

   • Countable
   • Uncountable

3. The rate at which a star radiates energy in all directions.

   Usage

   • Countable
   • Uncountable

   Examples

   We recognize the same pattern as in the left panel, with dM stars being much less frequent flarers than dMe stars of similar luminosity.

   More examples (1)

   We derive rotation periods, photometric activity indices, flaring energies, mass loss rates, gyrochronological ages, X-ray luminosities and consider implications for the planetary magnetospheres and habitability.

Noun

1. the quality of being luminous; emitting or reflecting light

   Synonyms

   brightnessbrightness levelluminanceluminousnesslight

   Broader terms

   physical property

   Examples

   its luminosity is measured relative to that of our sun