Findings from published research, checked in the open

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1,706 claims from 1,050 papers are on the record. 46 have been checked so far; the other 1,660 have no check with a result yet.

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Status: Unchecked ×Keyword: planetesimal accretion ×Clear all

6 claims from 3 papers

1. Physics and Astronomy › Astro and Planetary Science

   JUMPING NEPTUNE CAN EXPLAIN THE KUIPER BELT KERNEL

   Nesvorný · The Astronomical Journal · 2015

   The paper shows that the Kuiper belt 'kernel' at about 44 AU could be explained if Neptune's smooth outward migration was interrupted by a small sudden jump in its orbit when it reached about 28 AU.

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   1. UncheckedIn the paper's model, Neptune's 2:1 resonance lay at about 44 AU at the moment Neptune had migrated out to about 28 AU.“The 2:1 resonance was at ~44 AU when Neptune reached ~28 AU.”
   2. UncheckedIf Neptune migrated slowly after a sudden jump, its sweeping 2:1 resonance would thin out bodies at ~45-47 AU, helping explain few low-inclination orbits there.“If Neptune migration was conveniently slow after the jump, the sweeping 2:1 resonance would deplete the population of bodies at ~45-47 AU, thus contributing to the paucity of the low-inclination orbits in this region.”
   3. UncheckedA small sudden change in Neptune's orbit, perhaps from a planetary scattering, could have left a group of bodies at about 44 AU, where they would stay today.“If Neptune's semimajor axis changed by fraction of AU at this point, perhaps because Neptune was scattered off of another planet, the 2:1 population would have been released at ~44 AU, and would remain there to this day.”

2. Physics and Astronomy › Astro and Planetary Science

   The early instability scenario: Mars’ mass explained by Jupiter’s orbit

   Clement, Kaib, Raymond and Chambers · Icarus · 2021

   Using many simulations, the authors tested how an early instability in Jupiter's and Saturn's orbits affects the formation of Earth and Mars, largely confirming their earlier findings on Mars' small mass.

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   1. UncheckedSimulations suggest that a primordial 2:1 Jupiter-Saturn orbital resonance fits within an early giant-planet instability as a workable path for the solar system.“Moreover, our work validates the primordial 2:1 Jupiter-Saturn resonance within the early instability framework as a viable evolutionary path for the solar system.”

3. Physics and Astronomy › Astro and Planetary Science

   OSSOS. XXVI. On the Lack of Catastrophic Collisions in the Present Kuiper Belt

   Abedin, Kavelaars, Petit et al. · The Astronomical Journal · 2022

   The authors modelled impact energies among observed Kuiper Belt objects to test whether collisions have ground the population down since it formed, and found little sign of catastrophic collisions at present.

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   1. UncheckedMost collisions between objects in the Kuiper Belt today are cratering impacts, not ones that break the bodies apart, according to this study.“We conclude that presently, most of the collisions in the trans-Neptunian region are in the cratering rather than disruption regime.”
   2. UncheckedBecause collisions among cold classical Kuiper Belt objects are rare, their size distribution most likely reflects how planetesimals first formed.“Given the low collision rates among the cold classical Kuiper Belt objects, their SFD most likely represents the primordial planetesimal accretion.”