期刊
ICARUS
卷 209, 期 2, 页码 858-862出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.icarus.2010.05.028
关键词
Titan; Saturn
资金
- NASA OPR [NNX09AP30G, NNX08AQ69G]
- NASA GSRP [NNX09AM18H]
- NASA Lunar Science Institute
- NASA [NNX09AM18H, 115842, NNX08AQ69G, 95725, NNX09AP30G, 109002] Funding Source: Federal RePORTER
Accretional temperature profiles for Saturn's large moon Titan are used to determine the conditions needed for accretion to avoid global melting as a function of the timing, duration, and nebular conditions of Titan's accretion. We find that Titan can accrete undifferentiated in a gas-starved disk even with modest quantities of ammonia mixed in with its ices. Simulations of impact-induced core formation are used to show that Titan can remain only partially differentiated after an outer Solar System late heavy bombardment capable of melting its outer layers, permitting some of its rock to consolidate into a core. (C) 2010 Elsevier Inc. All rights reserved.
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