Table 4: Pressure coefficient $\kappa $, adiabatic index $\gamma $ and baryon mass $M_{\rm B}$ for polytropic NSs having the same compactness parameter and mass ( $M=1.35~{M}_\odot$) than NSs described by realistic EOSs (Table 1) ( $\hat{\rho}:=1.66$ $\times $ $10^{14}~{\rm g/cm^3}$ and $\hat{n}:=0.1~{\rm fm^{-3}}$).
corresponding EOS $\gamma $ $\kappa \ [\hat{\rho}c^2 \hat{n}^{-\gamma}]$ $M_{\rm B} [M_{\odot}]$
GNH3 2. 0.02645 1.44802
  2. 0.02037 1.47016
APR      
  2.5 0.01094 1.49561
BPAL12 2. 0.01908 1.47742


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