Satellites Form Fast and Late: a Population Synthesis for the Galilean Moons
Abstract
The satellites of Jupiter are thought to have formed in a circumplanetary disc. Here we study their formation and orbital evolution with a population synthesis approach, by varying the dust-to-gas ratio, the disc dispersal timescale and the dust refilling timescale of the CPD. The initial conditions of the disc (density and temperature) are directly drawn from the results of 3D radiative hydrodynamical simulations and the disc evolution is taken into account within the population synthesis. Our results show that the moons form fast, often within 10 thousand years, and that many are lost into the planet due to fast migration, polluting Jupiter's envelope with typically 15 Earth-masses of metals. The last generation of moons can form very late in the evolution of the giant planet and the distribution of the satellite-masses is peaking slightly above Galilean masses, up until a few Earth-masses, in a regime which is observable with the current instrumentation around Jupiter-analog exoplanets orbiting sufficiently close to their host stars.
- Publication:
-
EPSC-DPS Joint Meeting 2019
- Pub Date:
- September 2019
- Bibcode:
- 2019EPSC...13...60C