The Schoenberg-Chandrasekhar limit: A polytropic approximation
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- Beech, M. Astrophys Space Sci (1988) 147: 219. doi:10.1007/BF00645666
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The existence of a maximum isothermal core mass fraction (qmax), the Schoenberg-Chandrasekhar limit, is one of the ‘classic’ results from the theory of stellar structure. This limit can be demonstrated through a simplified composite polytrope model in which an isothermal core is surrounded by ann=1 polytrope envelope. While this model underestimatesqmas by ∼25% in the homogeneous case, it is accurate to within 5% in the more realistic inhomogeneous situation.