Distances of the circumplanetary H2O ice lines around a Jupiter-like planet (ordinate) as a function of distance to a Sun-like star (abscissa) at the time of moon formation shutdown. Each panel assumes a different shutdown formation rate (see panel titles). Three Planck opacities through the circumplanetary disk are tested in each panel (in units of m2 kg-1, see panel legends). The circumplanetary orbits of the Galilean satellites are represented by symbols as in Fig. 2. The black solid line shows the disk’s centrifugal radius (Machida et al. 2008). a) At Ṁshut = 100 MGan Myr-1 the H2O ice lines at ≈ 5 AU are about 5 RJup beyond Ganymede’s current orbit. b) At Ṁshut = 10 MGan/ Myr values of 10-2 m2 kg-1 ≤ κ ≤ 10-1 m2 kg-1 place the H2O ice line slightly inside the current orbit of Ganymede and thereby seem most plausible.
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