The dynamics of the large Magellanic Cloud periphery: Mass limit and polar ring

被引：65
|
作者：
Kunkel, WE
Demers, S
Irwin, MJ
Albert, L
机构：
[1] UNIV MONTREAL, DEPT PHYS, MONTREAL, PQ H3C 3J7, CANADA
[2] ROYAL GREENWICH OBSERV, CAMBRIDGE CB3 0EZ, ENGLAND
来源：
ASTROPHYSICAL JOURNAL | 1997年 / 488卷 / 02期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Magellanic Clouds;
D O I：
10.1086/310930
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Radial velocities of 759 carbon stars on the periphery of the LMC are used to determine the rotation curve from 3 to 12 kpc. After a peak of 42 km s(-1) at 4 kpc, the velocities decline to 35 km s(-1) at 6.5 kpc, suggesting that 90% of the LMC's matter lies inside this radius. The rising: velocities seen at larger radii are explained by particle-particle N-body simulations as arising from tidal interactions between LMC and both the SMC and the Galaxy. For an inclination of 33 degrees the mass contained within a 5 kpc radius is 6.2 +/- 0.9 x 10(9) M.. An upper limit on the LMC halo mass is determined.
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页码：L129 / L132
页数：4
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