Meteoritic Evidence for Injection of Trans-Neptunian Objects into the Inner Solar System

Zolensky, M ; Johnson, J ; Ziegler, K ; Chan, Q ; Kebukawa, Y ; Bottke, W ; Fries, M ; Martinez, J ; Le, L

关键词: CARBONACEOUS CHONDRITES;    FRACTIONATION;    GRAVITATIONAL EFFECTS;    IGNEOUS ROCKS;    METEORITIC COMPOSITION;    TRANS-NEPTUNIAN OBJECTS;    ASTEROID BELTS;    COMETS;    KUIPER BELT;    IMPACT VELOCITY;    MASS SPECTROMETERS;    NITROGEN ISOTOPES;    SOLAR SYSTEM;    TIME MEASUREMENT;   

RP-ID  :  JSC-E-DAA-TN51516

学科分类：空间科学

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来源: NASA Technical Reports Server

【 摘 要 】

There is excellent evidence that a dynamical instability in the early solar system led to gravitational interactions between the giant planets and trans-Neptunian planetesimals. Giant planetary migration triggered by the instability dispersed a disk of primordial trans-Neptunian object (TNOs) and created a number of small body reservoirs (e.g. the Kuiper Belt, scattered disk, irregular satellites, and the Jupiter/Neptune Trojan populations). It also injected numerous bodies into the main asteroid belt, where modeling shows they can successfully reproduce the observed P and D-type asteroid populations.