Density, shear modulus, viscosity, and temperature profiles of TRAPPIST-1b computed with BurnMan code for different compositions (listed in Table 1). Top: influence of temperature on profile. Bottom: influence of composition on profile. The black curve shows the same composition in all panels (Earth-like composition and a surface temperature of 800 K). The gray curve in the top panels shows the curve corresponding to the reference temperature (here 670 K). The rightmost panels also show the temperature of the solidus (red dashed line).