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2012

Actions for axisymmetric potentials

Binney, James

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We give an algorithm for the economical calculation of angles and actions for stars in axisymmetric potentials.

We test the algorithm by integrating orbits in a realistic model of the Galactic potential, and find that, even for orbits characteristic of thick-disc stars, the errors in the actions are typically smaller than 2 percent.
We describe a scheme for obtaining actions by interpolation on tabulated values that significantly accelerates the process of calculating observables quantities, such as density and velocity moments, from a distribution function.

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Built on

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Ollongren A., 1965, ARA&A, 3, 113
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De Zeeuw P.T., 1985, MNRAS, 216, 273
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Rowley G., 1988, ApJ, 331, 124
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Then

Binney J., McMillan P.J., 2011, MNRAS, 413, 1889
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Later among the works it cites.
Binney, J., 2012, arXiv1202.3403
2012
Closest in time.
McMillan P.J., Binney, J., 2012, MNRAS, 419, 2251
2012
Closest in time.
Schönrich R., Binney J., 2012, MNRAS, 419, 1546
Original
2012
Closest in time.

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