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Fig. 2

image

Averaged envelope structure for an envelope undergoing solid accretion at a rate of 10 ME/Myr (black) and an envelope not undergoing solid accretion (blue). Shown are the azimuthally averaged temperature and density in the planetary midplane (RADL27k0.01,RADL0k0.01). The diamond indicates the gas scale height H of the protoplanetary disk at the location of the planet, the circle the Hill radius rH of the 5ME core, the square the Bondi radius rB, and the triangle the estimated position of the radiative-convective boundary rrcb. The top panel (A) displays the temperature. The bottom panel (B) shows the azimuthally averaged density in the midplane. In the background we also show the density structure for a cooled-down isothermal planet with a gray dotted curve. An adiabatic convective interior, a polytrope with γ = 1.4, is shown with the purple dotted line up to rrcb.

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