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Revista Brasileira de Ensino de Física

Print version ISSN 1806-1117On-line version ISSN 1806-9126

Abstract

SMIRNOV, Andrei  and  OLIVEIRA, Ricardo Max Menezes. Self-graviting gas spheres in equilibrium state. Rev. Bras. Ensino Fís. [online]. 2015, vol.37, n.1, 1308.  Epub Mar 12, 2015. ISSN 1806-1117.  http://dx.doi.org/10.1590/S1806-11173711657.

In the paper we discuss equilibrium states of stars, using a simplified analytic model. A star is considered as a self-graviting body of gas. We use a condition for the equilibrium state of the body in the form of a differential equation, which relates the pressure distribution and mass density in the body. The density distributions of constant, potential, gaussian, and exponential forms are discussed. Exact expressions for the distribution of mass and pressure along the radial direction, and the central pressure were obtained.

Keywords : stellar analytic model; stellar equilibrium state.

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