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• W4205388618 endingPage "1314" @default.
• W4205388618 startingPage "1298" @default.
• W4205388618 abstract "In the general classical picture of pebble-based core growth, planetary cores grow by accretion of single pebble species. The growing planet may reach the so-called pebble isolation mass, at which it induces a pressure bump that blocks inward drifting pebbles exterior to its orbit, thereby stalling core growth by pebble accretion. In recent hydrodynamic simulations, pebble filtration by the pressure bump depends on several parameters including core mass, disc structure, turbulent viscosity and pebble size. We investigated how accretion of multiple, instead of single, pebble species affects core growth rates, and how the dependence of pebble isolation mass on turbulent viscosity and pebble size sets the final core masses. We performed numerical simulations in viscous 1D disc, where maximal grain sizes were regulated by grain growth, fragmentation and drift limits. We confirm that core growth rates and final core masses are sensitive to three key parameters: threshold velocity at which pebbles fragment on collision, turbulent viscosity and distribution of pebble species, which yield a diversity of planetary cores. With accretion of multiple pebble species, planetary cores can grow pretty fast, reaching over 30 -- 40 $M_{rm{E}}$ in mass. Potential cores of cold gas giants were able to form from embryos initially implanted as far as 50 AU. Our results suggest that accretion of multi-species pebbles could explain: the estimated 25 -- 45 $M_{rm{E}}$ heavy elements abundance inside Jupiter's core; massive cores of extrasolar planets; disc rings and gaps at wider orbits; early and rapid formation of planetary bodies." @default.
• W4205388618 created "2022-01-26" @default.
• W4205388618 creator A5006849253 @default.
• W4205388618 creator A5008254729 @default.
• W4205388618 creator A5046853075 @default.
• W4205388618 creator A5074571656 @default.
• W4205388618 date "2021-12-02" @default.
• W4205388618 modified "2023-10-10" @default.
• W4205388618 title "Planetary core formation via multispecies pebble accretion" @default.
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