The calculation of the stellar evolution models requires a large number of computations, requiring a fast computer for a reasonable turn-around time. The calculations of the stellar evolution models is performed on our web server (currently an 8 processor Athlon 1900 cluster), and typically require from one to ten minutes to complete.
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In order to use the applet you must log in every time you access the applet. If you are a new user you must create a new user identification before you log in to the applet. Once you log in to the applet, you may perform the following actions using the tab panes at the top of the applet:
The stellar model calculations are performed by a specialized version of the computer code Brian Chaboyer uses in his research. Details of this code may be found in the following publications: Chaboyer et al. 2001, ApJ, 562, 521 and Guenther et al. 1992, ApJ, 387, 372. If you use the results of these stellar evolution calculations in any publication, please reference the above two papers along with the URL of this web page.
In order to allow for the automatic generation of stellar evolution models for a wide range of conditions, a large number of parameters and tolerances in my code have been set to fixed values. Of particular note is that the numerical tolerances have been set such that the resultant stellar models have an accuracy of 1 part in 10,000. As such, these models are not suitable for research (such as helio and astro-seismology) that requires high precision stellar models.
The creation of this web interface to a state of the art stellar evolution computer code was made possible by an NSF CAREER award, a Cottrell Scholar award from the Research Corporation and a Cheheyl Fellowship from Dartmouth College, all to Brian Chaboyer.
Copyright © 2002 Brian Chaboyer, Dartmouth College