Open Access

Fig. 4

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Left panel: central conditions as a function of time. The red solid line is the temperature at the core-envelope interface, while the dotted black line shows the pressure at this point. These two curves belong to the left axis. The green long-dashed and the blue dashed line are the mean core and the central gas density, respectively. They belong to the right axis. Right panel: surface conditions as a function of time. The red solid line is the temperature at the surface Tsurf, while the dashed-dotted line visible at late times shows the temperature caused by the intrinsic luminosity only. The black dotted line is the background temperature. These lines belong to the left axis. The blue dashed line is the (total) pressure P. The green long-dashed line shows the contribution from the ram pressure during the gas runaway accretion phase. These lines belong to the right axis.

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