Approximation Functions to the Emden and Associated Emden Functions near the First Zero, II
Abstract
Improved analytic expressions are presented to approximate the Emden function, θ, and the associated Emden functionsθ and the associated Emden functions ψ_{0} and ψ_{2} near the first zero of θ at ξ_{1}. The error in θ and ψ_{0} at ψ=1.5ψ_{1} is not more than 0.000 001. The ψ_{2} error at the same point is less than 0.000 05.
 Publication:

Astrophysics and Space Science
 Pub Date:
 October 1975
 DOI:
 10.1007/BF00640361
 Bibcode:
 1975Ap&SS..37..401L