luminosity

English

Etymology

Borrowed from French luminosité, equivalent to luminous ‎ -ity.

Pronunciation

• Audio (US):

  (file)

• Rhymes: -ɒsɪti

Noun

luminosity (countable and uncountable, plural luminosities)

1. (uncountable) the state of being luminous, or a luminous object; brilliance or radiance
2. (physics) the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor
3. (astronomy) The rate at which a star radiates energy in all directions.
   • 2012, O. Havnes, B. R. Pettersen, J. H. M. M. Schmitt, Activity in Cool Star Envelopes: Proceedings, page 56:

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

   • 2015, D. J. Armstrong, C. E. Pugh, A.-M. Broomhall, D. J. A. Brown, M. N. Lund, H. P. Osborn, D. L. Pollacco, “The Host Stars of Keplers Habitable Exoplanets: Superflares, Rotation and Activity”, in arXiv‎^[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.

Derived terms

• Eddington luminosity
• high-luminosity
• low-luminosity
• luminosity distance
• luminosity function
• solar luminosity

 

Translations

state of being luminous

• Finnish: valoisuus (fi)
• French: luminosité (fr) f
• Georgian: სხივიერობა (sxivieroba), სხივოსნობა (sxivosnoba)
• German: Helligkeit (de) f
• Greek: αντιφέγγισμα (el) n (antiféngisma)
• Indonesian: kilau (id)
• Italian: luminosità (it) f
• Korean: 발광성 (balgwangseong)
• Romanian: luminozitate (ro)
• Russian: свечение (ru) n (svečenije)
• Spanish: luminosidad (es) f
• Turkish: parlaklık (tr)

ratio of luminous to radiant flux

• Finnish: luminositeetti, säteilyteho
• German: Leuchtkraft (de) f
• Greek: φωτεινότητα (el) f (foteinótita)
• Italian: luminosità (it) f

rate at which a star radiates energy

• Finnish: luminositeetti, säteilyteho
• German: Leuchtkraft (de) f
• Greek: φωτεινότητα (el) f (foteinótita)
• Italian: luminosità (it) f
• Norwegian:

  Bokmål: luminositet m

  Nynorsk: luminositet m

• Spanish: luminosidad (es) f
• Turkish: kadir (tr)

References

• luminosity on Wikipedia.Wikipedia