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Keyword: Moon formation ×Clear all

3 claims from 1 paper

1. Physics and Astronomy › Astro and Planetary Science

   Lunar and terrestrial planet formation in the Grand Tack scenario

   Jacobson and Morbidelli · Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences · 2014

   N-body simulations of the giant impact phase in the Grand Tack model suggest the early disc held mostly Mars-sized embryos, placing the Moon-forming impact at roughly 60 to 130 million years.

   Unchecked3 claims
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   1. UncheckedIn the authors' simulations, the ratio of total embryo mass to total planetesimal mass sets when the last giant, Moon-forming impact happens and how violent it is.“The total mass ratio of embryos to planetesimals controls the timing of the last giant (Moon forming) impact and its violence.”
   2. UncheckedIn the authors' simulations, the starting mass of each embryo determines how big the Moon-forming impactor is and how fast Mars grows.“The initial embryo mass sets the size of the lunar impactor and the growth rate of Mars.”
   3. UncheckedSimulations matched to the real terrestrial planets suggest the early disc held most of its mass in Mars-sized embryos, with few planetesimals.“After comparing our simulated outcomes with the actual orbits of the terrestrial planets (angular momentum deficit, mass concentration) and taking into account independent geochemical constraints on the mass accreted by the Earth after the Moon forming event and on the timescale for the growth of M…”