Origin of a partially differentiated Titan

被引：35
作者：
Barr, Amy C. [1 ,2 ]
Citron, Robert I. [2 ,3 ]
Canup, Robin M. [2 ,4 ]
机构：
[1] SW Res Inst, Dept Space Studies, Boulder, CO 80302 USA
[2] Ctr Lunar Origin & Evolut, Boulder, CO 80302 USA
[3] Atmospher & Space Phys Lab, Boulder, CO 80309 USA
[4] SW Res Inst, Planetary Sci Directorate, Boulder, CO 80302 USA
来源：
ICARUS | 2010年 / 209卷 / 02期
关键词：
Titan; Saturn; CALLISTO; GANYMEDE; SATELLITES; VISCOSITY; EVOLUTION; METHANE;
D O I：
10.1016/j.icarus.2010.05.028
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
引用
收藏
页码：858 / 862
页数：5
相关论文
共 30 条
  • [1] [Anonymous], 1974, Ice Physics
  • [2] Constraints on gas giant satellite formation from the interior states of partially differentiated satellites
    Barr, Amy C.
    Canup, Robin M.
    [J]. ICARUS, 2008, 198 (01) : 163 - 177
  • [3] Origin of the Ganymede-Callisto dichotomy by impacts during the late heavy bombardment
    Barr, Amy C.
    Canup, Robin M.
    [J]. NATURE GEOSCIENCE, 2010, 3 (03) : 164 - 167
  • [4] Forced obliquity and moments of inertia of Titan
    Bills, Bruce G.
    Nimmo, Francis
    [J]. ICARUS, 2008, 196 (01) : 293 - 297
  • [5] Formation of the Galilean satellites: Conditions of accretion
    Canup, RM
    Ward, WR
    [J]. ASTRONOMICAL JOURNAL, 2002, 124 (06) : 3404 - 3423
  • [6] Canup RM., 2009, The University of Arizona space science series, P59
  • [7] A common mass scaling for satellite systems of gaseous planets
    Canup, Robin M.
    Ward, William R.
    [J]. NATURE, 2006, 441 (7095) : 834 - 839
  • [8] VISCOSITY OF ROCK ICE MIXTURES AND APPLICATIONS TO THE EVOLUTION OF ICY SATELLITES
    FRIEDSON, AJ
    STEVENSON, DJ
    [J]. ICARUS, 1983, 56 (01) : 1 - 14
  • [9] Origin of the cataclysmic Late Heavy Bombardment period of the terrestrial planets
    Gomes, R
    Levison, HF
    Tsiganis, K
    Morbidelli, A
    [J]. NATURE, 2005, 435 (7041) : 466 - 469
  • [10] The ammonia-water system at high pressures: Implications for the methane of Titan
    Grasset, O
    Pargamin, J
    [J]. PLANETARY AND SPACE SCIENCE, 2005, 53 (04) : 371 - 384
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