Figure 1

EOS for symmetric matter and different models: pressure as a function of the baryon number density. The enclosed area represents experimental data according to Danielewicz et al. [25].Reuse & Permissions

Figure 2

Symmetry energy as a function of the baryon number density (a) for different models and (b) for modified IU-FSU.Reuse & Permissions

Figure 3

Strangeness fraction when hyperons are present for (a) set $A$ and (b) set $B$.Reuse & Permissions

Figure 4

Strangeness fraction for IU-FSU and related parametrizations with (a) meson-hyperon coupling set $A$ and (b) meson-hyperon coupling set $B$.Reuse & Permissions

Figure 5

Chemical potential for neutral (full lines), positively charged (dotted lines), and negatively charged (dashed lines) baryons in $\beta$ equilibrium: hyperon set $A$ (left panel) and hyperon set $B$ (right panel). The thick lines are for IU-FSU (set 1) and the thin lines are for set 7 of the modified IU-FSU.Reuse & Permissions

Figure 6

Particle fractions, IU-FSU for (a) set $A$ and (b) set $B.$Reuse & Permissions

Figure 7

Onset of direct Urca process in stellar matter without hyperons: proton fraction for $\beta$-equilibrium matter and proton fraction at the onset of the direct Urca process (black region) (a) for NL3, GM1, GM3, NL$\rho$, FSU, IU-F and (b) for modified IU-FSU.Reuse & Permissions

Figure 8

Onset of direct Urca process in stellar matter. Left panel corresponds to modified IU-FSU model and right panel corresponds to NL3, GM1, GM3, NL$\rho$, FSU, and IU-FSU, for no-hyperon matter (red triangles), hyperon coupling set $A$ (green squares) and hyperon coupling set $B$ (blue stars). In the left panel the direct Urca process involving $\Lambda$ is also shown (full dots). All the other data refer to the direct Urca process for protons and neutrons.Reuse & Permissions

Figure 9

Mass-radius curves obtained for no-hyperon stellar matter EOS for (a) NL3, GM1, GM3, NL$\rho$, FSU, and IU-FSU and for (b) IU-FSU and modified IU-FSU. The areas limited by the dotted gray and solid black curves are given by [3].Reuse & Permissions

Figure 10

Mass-radius relations obtained for NL3, GM1, GM3, NL$\rho$, FSU, and IU-FSU with the hyperon-meson coupling (a) set $A$ and (b) set $B$.Reuse & Permissions

Figure 11

Mass-radius relations obtained with the modified IU-FSU and with the meson-hyperon coupling for (a) set $A$ and for (b) set $B$.Reuse & Permissions

Figure 12

Star-radius dependence on the slope of the symmetry energy for stars with maximum mass (squares), $1.4M_{\odot }$ (circles), and $1M_{\odot }$ (triangles). The empty symbols are for the set of different models considered with hyperon coupling $A$. The full symbols are for the modified IU-FSU (a) with no hyperons, (b) with hyperons and for coupling $A$, and (c) with hyperons and for coupling $B$.Reuse & Permissions