FIG 5 - uploaded by Njabulo Mkhize
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Plot of equation of state (p = p(ρ)) versus radius (r). 

Plot of equation of state (p = p(ρ)) versus radius (r). 

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We investigate the behaviour of the Tolman metrics within the formalism of the trace-free (or unimodular) gravity. While this approach is similar to the standard Einstein field equations, some subtlety arises. The effective number of independent field equations is reduced by one on account of the density and pressure appearing as an inseparable ent...