The Collisional Evolution of the Primordial Kuiper Belt, Its Destabilized Population, and the Trojan Asteroids
نویسندگان
چکیده
Abstract The tumultuous early era of outer solar system evolution culminated when Neptune migrated across the primordial Kuiper Belt (PKB) and triggered a dynamical instability among giant planets. This event led to ejection ∼99.9% PKB (here called destabilized population), heavy bombardment planet satellites, capture Jupiter’s Trojans. While this scenario has been widely tested using models, there have fewer investigations into how PKB, its population, Trojans experienced collisional evolution. Here we examined issue for all three populations with code Boulder. Our constraints included size–frequency distributions (SFDs) Trojan asteroids craters on satellites. Using combination, solved unknown disruption law affecting bodies in these populations. weakest ones, from an impact energy per mass perspective, were diameter D ∼ 20 m. Overall, produces power-law-like shape multikilometer wavy-shaped SFD latter can explain (i) shapes ancient younger crater SFDs observed (ii) Jupiter family long-period comet SFDs, which different degrees collision evolution, (iii) present-day frequency superbolides smaller projectiles Saturn’s rings. model results also indicate that many comets, majority are < 10 km, likely be gravitational aggregates formed by large-scale events.
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theoretical evidence for a population of bodies beyond the region of the giant planets. Edgeworth (1949) and Kuiper The Edgeworth–Kuiper Belt contains a population of objects P10 times that of the main asteroid belt, spread over a volume (1951) argued for such a population based on the composiP10 larger and with relative speeds P10 times lower. As for tion of comets and the implausibility of a ...
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ژورنال
عنوان ژورنال: The planetary science journal
سال: 2023
ISSN: ['2632-3338']
DOI: https://doi.org/10.3847/psj/ace7cd