Astrophysics and Space Science

, Volume 100, Issue 1–2, pp 447–449 | Cite as

The boundary conditions for polytropic gas spheres

  • Jabbar R. Jabbar
Letters to the Editor


Emden's differential equation for polytropic gas spheres, as well as Chandrasekhar's equation for associated Emden function of zero order and indexn=0(0.1)4.9 have been integrated numerically with a CDC 7600 automatic computer to 16 decimal places; and the surface values of the respective functions compared with previous work.


Boundary Condition Differential Equation Zero Order Decimal Place Automatic Computer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Chandrasekhar, S.: 1933,Monthly Notices Roy. Astron. Soc. 93, 390, 539.Google Scholar
  2. Comrie, L. J. and Sadler, D. H.: 1930,Tables of the Emden Functions, British Assoc. Math. Tables, Vol. 2.Google Scholar
  3. Jeans, J. H.: 1929,Astronomy and Cosmogony (second edition), Cambridge University Press, p. 267.Google Scholar
  4. Kopal, Z.: 1983,Astrophys. Space Sci. 93, 149.Google Scholar

Copyright information

© D. Reidel Publishing Company 1984

Authors and Affiliations

  • Jabbar R. Jabbar
    • 1
  1. 1.Department of AstronomyUniversity of ManchesterEngland, UK

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