10527
EXPLORE
LATEST
ABOUT
AUTHORING AREA
PARTICIPATE
Your browser does not support JavaScript or it may be disabled!
Stellar Luminosity
The luminosity, the amount of light emitted by a star, depends on the star's size and temperature.
Contributed by:
Jeff Bryant
THINGS TO TRY
Rotate and Zoom in 3D
Slider Zoom
SNAPSHOTS
DETAILS
The luminosity of a star is proportional to the surface area times the energy radiated per square meter (σ is the Stefan-Boltzmann constant):
Dividing the expressions for the luminosities of a star and the Sun allows us to compare them:
Snapshot 1: A star the same size as the Sun but about half as hot is much less luminous than the Sun.
Snapshot 2: A star about half as hot as the Sun but 20 times larger is nearly 29 times more luminous than the Sun.
Snapshot 3: A star the same size as the Sun that is about 4 times hotter is over 345 times more luminous than the Sun.
Snapshot 4: A star 20 times the size of the Sun and about 4 times hotter is over 138,000 times more luminous than the Sun.
RELATED LINKS
Stefan-Boltzmann Law
(
ScienceWorld
)
PERMANENT CITATION
"
Stellar Luminosity
" from
the Wolfram Demonstrations Project
http://demonstrations.wolfram.com/StellarLuminosity/
Contributed by:
Jeff Bryant
Share:
Embed Interactive Demonstration
New!
Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site.
More details »
Download Demonstration as CDF »
Download Author Code »
(preview »)
Files require
Wolfram
CDF Player
or
Mathematica
.
Related Demonstrations
More by Author
Blackbody Spectrum
Jeff Bryant
Pulsars
Jeff Bryant
Contact Binary Star Envelopes
Jeff Bryant
Stellar Nucleosynthesis
Jeff Bryant
Radius and Temperature of Main Sequence Stars
Jeff Bryant
Orbital Wobble
Jeff Bryant
The Celestial Two-Body Problem
S. M. Blinder
Colliding Galaxies
Jeff Bryant and Dale Horton
Lane-Emden Equation in Stellar Structure
Brian Kent
Modeling Light Curves
Jeff Bryant
Related Topics
3D Graphics
Astronomy
Astrophysics
High School Astronomy
Browse all topics
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to
Mathematica Player 7EX
I already have
Mathematica Player
or
Mathematica 7+