Fig. 11

Cumulative energy of an icy planetesimal for model 500–10A. The lines represent radiogenic heat (solid line), heat of the aqueous alteration (long-dashed line), change in internal energy (dot-dot-dashed line), latent heat of ice (dotted line), radiation at the surface (short-dashed line), heatofthedehydrationreaction(dot-dashed line) and “heat source-heat consumption”, i.e. the difference between the sum of the heat sources and the sum of the heat consumptions (thin solid line), respectively. The abscissa shows the time after CAI formation in units of a million years and the ordinate shows the cumulative energy in joules. Note that the heat sources (radiogenic heat and heat of the aqueous alteration) are positive in the ordinate, and that the heat consumptions (change in internal energy, latent heat of ice, radiation at surface, heat of the dehydration reaction) are negative in the ordinate.