Galaxy Rotation with Dark Matter Model Documents

This material has 2 associated documents. Select a document title to view a document's information.

Main Document

Galaxy Rotation with Dark Matter 

written by Armando Pisani

The Galaxy Rotation with Dark Mater model shows that the actual rotation of spiral galaxies cannot be accounted for by visible matter alone. Newtonian dynamics allows us to compute the amount of additional matter, that we call "dark", needed to compute correctly the observed galaxy rotation curve. Here we use a simple model to simulate the galaxy rotation curve and the distribution of visible matter (namely, stars) within the galaxy. It is possible to vary the parameters of the dark matter distribution in order to improve the interpretation of the rotation of the galaxy.

The Galaxy Rotation with Dark Mater model was created using the Easy Java Simulations (EJS) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double click the ejs_astro_GalaxyRotation.jar file to run the program if Java is installed.

Last Modified August 19, 2013

This file has previous versions.

Source Code Documents

Galaxy Rotation with Dark Matter Source Code 

The source code zip archive contains an EJS-XML representation of the Galaxy Rotation with Dark Matte Model.   Unzip this archive in your EJS workspace to compile and run this model using EJS.

Last Modified October 25, 2011