A search for southern ultracool dwarfs in young moving groups

被引：0

作者：

Clarke, J. R. A. ^{[1
]}

Pinfield, D. J. ^{[1
]}

Galvez-Ortiz, M. C. ^{[1
]}

Jenkins, J. S. ^{[2
]}

Burningham, B. ^{[1
]}

Deacon, N. R. ^{[3
,4
]}

Jones, H. R. A. ^{[1
]}

Pokorny, R. S. ^{[5
]}

Barnes, J. R. ^{[1
]}

Day-Jones, A. C. ^{[1
,2
]}

机构：

[1] Univ Hertfordshire, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England

[2] Univ Chile, Dept Astron, Santiago, Chile

[3] Radboud Univ Nijmegen, Dept Astron, Fac Sci, NL-6500 GL Nijmegen, Netherlands

[4] Univ Hawaii, Astron Inst, Honolulu, HI 96822 USA

[5] Yunnan Observ, Kunming 650011, Peoples R China

来源：

RESEARCH, SCIENCE AND TECHNOLOGY OF BROWN DWARFS AND EXOPLANETS | 2011年 / 16卷

关键词：

STELLAR KINEMATIC GROUPS; BROWN DWARF; VELOCITIES;

D O I：

10.1051/epjconf/20111606004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have constructed an 800-strong red object catalogue by cross-referencing optical and infrared catalogues with an extensive proper motion catalogue compiled for red objects in the southern sky to obtain proper motions. We have applied astrometric and photometric constraints to the catalogue in order to select ultracool dwarf moving group candidates. 132 objects were found to be candidates of a moving group. From this candidate list we present initial results. Using spectroscopy we have obtained reliable spectral types and space motions, and by association with moving groups we can infer an age and composition. the further study of the remainder of our candidates will provide a large sample of young brown dwarfs and confirmed members will provide benchmark ultracool dwarfs. These will make suitable targets of AO planet searches.

引用

页数：4

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