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Velocity Corrections To Kepler Energy And Laplace Integral

Author

Listed:
  • DA-ZHU MA

    (Department of Physics, Nanchang University, Nanchang 330031, P. R. China)

  • XIN WU

    (Department of Physics, Nanchang University, Nanchang 330031, P. R. China)

  • FU-YAO LIU

    (Shanghai Lixin University of Commerce, Shanghai 201600, P. R. China)

Abstract

For each celestial body of multi-planet systems, there are two slowly varying quantities or quasi-integrals, Kepler energy and Laplace integral, which are closely associated with the orbital semimajor axis and eccentricity, respectively. To correct numerical errors of the quantities, we give an extension of Nacozy's approach and develop a new manifold correction method, where corresponding reference values of the quantities at every integration step are obtained from integral invariant relations, and only velocity corrections are used to approximately satisfy the two quasi-integrals. As a result, the scheme does enhance the quality of the integration by significantly raising the accuracy of the two elements. Especially, it is superior to the existing dual scaling method in the improvement of eccentricity in general when the adopted integrator provides a sufficient precision to the eccentricity.

Suggested Citation

  • Da-Zhu Ma & Xin Wu & Fu-Yao Liu, 2008. "Velocity Corrections To Kepler Energy And Laplace Integral," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 19(09), pages 1411-1424.
    • Handle: RePEc:wsi:ijmpcx:v:19:y:2008:i:09:n:s0129183108012996
    DOI: 10.1142/S0129183108012996
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