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Paper: Difficulties of Chondrule Formation by Nebular Shock Waves
Volume: 341, Chondrites and the Protoplanetary Disk
Page: 893
Authors: Uesugi, M.; Akaki, T.; Sekiya, M.; Nakamura, T.; Tsuchiyama, A.; Nakano, T.; Uesugi, K.
Abstract: In this paper we investigate two constraints on chondrule formation by solar nebula shocks: the transport of FeS inclusions by internal flows in the molten silicate, and the formation of compound chondrules. A recent study has shown that if chondrules formed due to nebular shock waves, a high-speed (~5 cm s−1) rotational flow occurs in chondrules during melting, which will greatly affect the final placement of FeS inclusions in the chondrules. Collision between chondrules while they are molten or partially molten, can cause them to stick and form compound chondrules, but only in a a suitable range of relative velocities. These features of chondrules place important constraints on the chondrule formation process.
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