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- W2026584625 abstract "We present a simple analytic model of a composite polytropic star, which exhibits a limiting Schönberg—Chandrasekhar core mass fraction strongly analogous to the classic numerical result for an isothermal core, a radiative envelope and a μ-jump (i.e. a molecular weight jump) at the interface. Our model consists of an nc = 5 core, an ne = 1 envelope and a μ-jump by a factor ≥ 3; the core mass fraction cannot exceed 2/π. We use the classic U,V plane to show that composite models will exhibit a Schönberg—Chandrasekhar limit only if the core is ‘soft’, i.e. has nc ≥ 5, and the envelope is ‘hard’, i.e. has ne < 5; in the critical case (nc = 5), the limit only exists if the μ-jump is sufficiently large, ≥ 6/(ne + 1)." @default.
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- W2026584625 date "1998-08-11" @default.
- W2026584625 modified "2023-09-25" @default.
- W2026584625 title "A small contribution to the giant problem" @default.
- W2026584625 doi "https://doi.org/10.1046/j.1365-8711.1998.01655.x" @default.
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