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Keyword: planet formation timescales ×Clear all

2 claims from 1 paper

1. Physics and Astronomy › Astro and Planetary Science

   Water delivery and giant impacts in the ‘Grand Tack’ scenario

   O'Brien, Walsh, Morbidelli, Raymond and Mandell · Icarus · 2014

   Simulations of the 'Grand Tack' model of Solar System formation examine water delivery to the planets and the timing of giant impacts, comparing the results with Earth's water and the Moon-forming impact.

   Unchecked2 claims
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   1. UncheckedIn these simulations, the forming planets take in roughly 1-2% of their total mass from primitive planetesimals scattered onto planet-crossing orbits.“We find here that the planets will accrete on order 1-2% of their total mass from primitive planetesimals scattered onto planet-crossing orbits during the formation of the planets.”
   2. UncheckedIf primitive planetesimals are 10% water by mass, the Grand Tack model delivers about as much water as Earth is estimated to hold today.“For an assumed value of 10% for the water mass fraction of the primitive planetesimals, this model delivers a total amount of water comparable to that estimated to be on the Earth today.”