{"id":13109,"date":"2017-06-30T20:03:54","date_gmt":"2017-06-30T18:03:54","guid":{"rendered":"http:\/\/karmaka.de\/?p=13109"},"modified":"2017-07-06T08:47:33","modified_gmt":"2017-07-06T06:47:33","slug":"origin-of-water-in-the-inner-solar-system-planetesimals-scattered-inward-during-jupiter-and-saturns-rapid-gas-accretion","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=13109","title":{"rendered":"Origin of water in the inner Solar System: planetesimals scattered inward during Jupiter and Saturn\u2019s rapid gas accretionOPEN ACCESS<\/span> "},"content":{"rendered":"

Sean N. Raymond, Andre Izidoro<\/p>\n

Icarus
\nIn Press, Accepted Manuscript, Available online 30 June 2017
\n(updated 6 July 2017)<\/p>\n

PDF (OPEN ACCESS)<\/strong><\/a>
\nLINK<\/strong><\/a><\/p>\n

“Highlights
\n\u2022 The water-rich bodies interior to Jupiter\u2019s orbit \u2013 both the C-type asteroids and the progenitors of water on Earth – are simple byproducts of giant planet growth.
\n\u2022 The giant planets\u2019 growth scatters nearby planetesimals and injects a significant fraction into the inner Solar System
\n\u2022 Scattered planetesimals are captured into the outer main belt and can explain the C-type asteroids.
\n\u2022 Planetesimals scattered past the asteroid belt onto high-eccentricity orbits may have delivered Earth\u2019s water. This happened preferentially late in the disk lifetime when gas drag was weaker.
\n\u2022 The mechanism of planetesimal scattering and implantation is generic, robust to a wide range of migration histories for the giant planets, and takes place every time a giant planet forms.”<\/p>\n

“There is a long-standing debate regarding the origin of the terrestrial planets\u2019 water as well as the hydrated C-type asteroids. Here we show that the inner Solar System\u2019s water is a simple byproduct of the giant planets\u2019 formation. Giant planet cores accrete gas slowly until the conditions are met for a rapid phase of runaway growth. As a gas giant\u2019s mass rapidly increases, the orbits of nearby planetesimals are destabilized and gravitationally scattered in all directions. Under the action of aerodynamic gas drag, a fraction of scattered planetesimals are deposited onto stable orbits interior to Jupiter\u2019s. This process is effective in populating the outer main belt with C-type asteroids that originated from a broad (5-20 AU-wide) region of the disk. As the disk starts to dissipate, scattered planetesimals reach sufficiently eccentric orbits to cross the terrestrial planet region and deliver water to the growing Earth. This mechanism does not depend strongly on the giant planets\u2019 orbital migration history and is generic: whenever a giant planet forms it invariably pollutes its inner planetary system with water-rich bodies.”<\/p>\n

Water-rich asteroids and Earth’s water as a byproduct of Jupiter and Saturn’s growth<\/strong><\/p>\n