Astrophysics (index)about

Luminosity

(L)
(measure of brightness)

Luminosity is the total rate of energy Emission by a star or other astronomical object, often expressed in Joules per second (Watts). Thus it is the power of the starshine. Absolute Magnitude is an alternate measure of the same thing, expressed logarithmically.

The term is also used in discussions of Stellar Structure to refer to the energy emission of a portion of a star, in the case of a star, typically the energy production of a centered, spherical volume, such as the Stellar Core.


(EMR,measure)
http://en.wikipedia.org/wiki/Luminosity

Referenced by:
Accretion
Achernar
A-type Star (A)
Active Galaxy
AD Leonis (AD Leo)
Asymptotic Giant Branch (AGB)
Active Galactic Nucleus (AGN)
Algol (Beta Per)
Alpha Centauri
Arcturus
Barnard's Star
B-type Star (B)
Beta Centauri
Betelgeuse
Binary Star
Bolometric Luminosity (LBol)
Bolometric Magnitude (Mbol)
Canopus
Cepheid Variable
Conditional Luminosity Function (CLF)
Cluster Radius
Color-Magnitude Diagram (CMD)
Compact Object
Dwarf Spheroidal Galaxy (dSph)
Eddington Luminosity
Epsilon Eridani
Epsilon Indi (ε Indi)
Faber-Jackson Relation
F-type Star (F)
Fanaroff-Riley Classification
Galaxy Group
G-Type Star (G)
Globular Cluster Luminosity Function (GCLF)
Giant Star
Halo Abundance Matching (HAM)
Horizontal Branch (HB)
HII Region (HII)
Hyperluminous Infrared Galaxy (HLIRG)
HR 8799
H-R Diagram (HRD)
Hypergiant
Infrared (IR)
Kapteyn's Star
K-Type Star (K)
Kelvin-Helmholtz Mechanism
Lacaille 9352
Lalande 21185
LHS 1140
Luminous Infrared Galaxy (LIRG)
Low-Surface-Brightness Galaxy (LSB Galaxy)
Luminosity Class
Luminosity Density
Luminosity Distance (dL)
Luminosity Function (LF)
Luyten 726-8
Mass-Luminosity Relation
Mass-To-Light Ratio (M/L)
M-Type Star (M)
Molecular Cloud
O5 Spectral Class (O5)
O-Type Star (O)
Planetary Nebula Luminosity Function (PNLF)
Procyon
Radiant Flux
Radio Source Counts
Relativistic Beaming
Rigel
Ross 154
Ross 248
Salpeter Timescale
Sirius
Spectral Class
Stellar Luminosity Determination
Stellar Mass Determination
Stellar Parameter Determination
Stellar Radius Determination
Stellar Structure
Sun
Sunspot
Supergiant
Surface Density (Σ)
Synchrotron Radiation
Tully-Fisher Relation (TFR)
TRAPPIST-1
Turn-off Point (TO)
Type Ia Supernova
Ultraluminous Infrared Galaxy (ULIRG)
Vega
Volume Weighting
Wilson-Bappu Effect
Wolf 359
Wolf-Rayet Star

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