Approximate implicit solution of a Lane-Emden equation

Details Approximate implicit solution of a Lane-Emden equation Approximate implicit solution of a Lane-Emden equation

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006newa...11..520m&link_type=abstract

New Astronomy, Volume 11, Issue 7, p. 520-526.

Astronomy and Astrophysics

Astronomy

11

98.80.Jk, 97.10.-Q

Scientific paper

In this paper, we obtain an approximate implicit solution admitted by the Lane-Emden equation y″ + (2/x)y′ + ey = 0 describing the dimensionless density distribution in an isothermal gas sphere. The new approximate implicit solution has a larger radius of convergence than the power series solution. This is achieved by reducing the Lane-Emden equation to first-order using Lie group analysis and determining a power series solution of the reduced equation. The power series solution of the reduced equation transforms into an approximate implicit solution of the original equation. The approximate implicit solution diverges from the power series solution in the radius of convergence.

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