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Plot of energy conditions (ρ − p, ρ + p and ρ + 3p) versus radius (r). 

Plot of energy conditions (ρ − p, ρ + p and ρ + 3p) versus radius (r). 

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FIG. 2. Plot of pressure (p) versus radius (r). 
Figure 3 depicts the sound of speed value versus the radial r...
FIG. 4. Plot of energy conditions (ρ − p, ρ + p and ρ + 3p) versus...
FIG. 5. Plot of equation of state (p = p(ρ)) versus radius (r). 
+4 FIG. 8. Energy density (ρ) versus radius (r). 
Qualitative analysis of the Tolman metrics within the unimodular framework
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  • Jun 2018
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...
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