Possible thermal evolutionary pathways of irregular shaped small asteroids and planetesimals
نویسندگان
چکیده
Two distinct thermal evolutionary pathways of irregular-shaped small planetesimals in the early solar system have been studied. We taken a case study two S-type asteroids: (243) Ida and (951) Gaspra, on basis their precise physical dimensions accessed by Philip Stooke body 3-D shape models NASA Planetary Data System. The for asteroids are based Galileo spacecraft fly-by mission. Based our novel code asteroids, we found that planetary bodies accreted within initial 2–3 million years (Myr) experienced sintering, whereas formed afterwards were left unconsolidated, e.g., as rubble pile. former set could direct aggregation nebula dust, or accretion sub km-sized bodies. Whereas, majority pile type later assemblage fragmented debris initially existing planetesimals. These cooled over tens millions years. generations time evolved from an ensemble compact consolidated to due collision-induced fragmentation re-accretion.
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ژورنال
عنوان ژورنال: Journal of Earth System Science
سال: 2022
ISSN: ['0253-4126', '0973-774X', '2347-4327']
DOI: https://doi.org/10.1007/s12040-022-01813-4