Origin of a partially differentiated Titan

被引：36

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

页码：858 / 862

页数：5

共 30 条

[1]

[Anonymous], 1974, Ice Physics

[2] Constraints on gas giant satellite formation from the interior states of partially differentiated satellites [J].

Barr, Amy C. ;

Canup, Robin M. .

ICARUS, 2008, 198 (01) :163-177

[3] Origin of the Ganymede-Callisto dichotomy by impacts during the late heavy bombardment [J].

Barr, Amy C. ;

Canup, Robin M. .

NATURE GEOSCIENCE, 2010, 3 (03) :164-167

[4] Forced obliquity and moments of inertia of Titan [J].

Bills, Bruce G. ;

Nimmo, Francis .

ICARUS, 2008, 196 (01) :293-297

[5] Formation of the Galilean satellites: Conditions of accretion [J].

Canup, RM ;

Ward, WR .

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 [J].

Canup, Robin M. ;

Ward, William R. .

NATURE, 2006, 441 (7095) :834-839

[8] VISCOSITY OF ROCK ICE MIXTURES AND APPLICATIONS TO THE EVOLUTION OF ICY SATELLITES [J].

FRIEDSON, AJ ;

STEVENSON, DJ .

ICARUS, 1983, 56 (01) :1-14

[9] Origin of the cataclysmic Late Heavy Bombardment period of the terrestrial planets [J].

Gomes, R ;

Levison, HF ;

Tsiganis, K ;

Morbidelli, A .

NATURE, 2005, 435 (7041) :466-469

[10] The ammonia-water system at high pressures: Implications for the methane of Titan [J].

Grasset, O ;

Pargamin, J .

PLANETARY AND SPACE SCIENCE, 2005, 53 (04) :371-384

← 1 2 3 →