Proper motions of field L and T dwarfs - II

被引：27

作者：

Casewell, S. L. ^{[1
]}

Jameson, R. F. ^{[1
]}

Burleigh, M. R. ^{[1
]}

机构：

[1] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2008年 / 390卷 / 04期

基金：

美国国家科学基金会; 英国科学技术设施理事会; 美国国家航空航天局;

关键词：

stars: kinematics; stars: low-mass; brown dwarfs; open clusters and associations: individual: Ursa Major; open clusters and associations: individual: Hyades; open clusters and associations: individual: Pleiades;

D O I：

10.1111/j.1365-2966.2008.13855.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

By using images taken with Wide Field Camera (WFCAM) on United Kingdom Infrared Telescope (UKIRT) and Son of ISAAC (SofI) on the New Technology Telescope (NTT) and combining them with Two Micron All Sky Survey (2MASS) we have measured proper motions for 126 L and T dwarfs in the dwarf archive. Two of these L dwarfs appear to have M dwarf common proper motion companions, and two also appear to be high-velocity dwarfs, indicating possible membership of the thick disc. We have also compared the motion of these 126 objects to that of numerous moving groups, and have identified new members of the Hyades, Ursa Major and Pleiades moving groups. These new objects, as well as those identified in Jameson et al. have allowed us to refine the L dwarf sequence for Ursa Major that was defined by Jameson et al.

引用

页码：1517 / 1526

页数：10

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