Showing posts with label problema a due corpi. Show all posts
Showing posts with label problema a due corpi. Show all posts

Wednesday 6 April 2011

ECLIPSING BINARY STARS

"Eclipsing binary stars are just one several types of variable stars. These stars appear as a single point of light to an observer, but based on its brightness variation and spectroscopic observations we can say for certain that the single point of light is actually two stars in close orbit around one another. The variations in light intensity from eclipsing binary stars is caused by one star passing in front of the other relative to an observer. If we assume that the stars are spherical and that they have circular orbits, then we can easily approximate how the light varies as a function of time for eclipsing binary stars. These calculations can be performed in a relatively short computer program."
http://www.physics.sfasu.edu/astro/ebstar/ebstar.html

Stelle doppie- Problema a due corpi

Domanda molto interessante di uno studente sul moto delle stelle doppie. Per discuterlo in dettaglio, dobbiamo avere alcune nozioni che ancora ci mancano, Una bella discussione è fatta  da Wiki
http://en.wikipedia.org/wiki/Two-body_problem
Il sito mostra alcuni filmati col moto di sistemi binari con diverse masse.


Se cliccate sulla figura, si vede l'animazione

Le due stelle hanno la loro orbita ellittica attorno alla croce rossa che rappresenta la posizione del centro di massa del sistema.