COOL DWARFS IN WIDE MULTIPLE SYSTEMS PAPER 2: A DISTANT M8.5V COMPANION TO HD 212168 AB

被引：0

作者：

Caballero, Jose A. ^{[1
]}

Montes, David ^{[2
]}

机构：

[1] Ctr Astrobiol CSIC INTA, Madrid, Spain

[2] Univ Complutense Madrid, Madrid, Spain

来源：

OBSERVATORY | 2012年 / 132卷 / 1228期

关键词：

GENEVA-COPENHAGEN SURVEY; SOLAR-TYPE STARS; ALL-SKY SURVEY; STELLAR KINEMATIC GROUPS; VOLUME-LIMITED SAMPLE; LOW-MASS STARS; HIPPARCOS CATALOG; PROPER-MOTION; NEARBY STARS; ULTRACOOL DWARFS;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

DENTS J222644.3-750342 is a nearby, very-low-mass, M8.5V-type star that has been repeatedly targeted by kinematic and activity studies. Thought to be an isolated star, it is actually a wide common-proper-motion companion at 265 arcsec from the bright Go V Hipparcos star HD 212168. The third member in the trio is CD-75 degrees 1242, a poorly investigated K dwarf. We confirm the physical binding of the triple system, which we call Koenigstuhl 5, by compiling common radial velocities and proper motions and measuring constant angular separations and position angles between components A, B, and C, over very long time baselines (A-B: 114 yr; A C: 22 yr). With about 0.095 M-circle dot, the M8.5 V star at 6090 AU to the Go V primary is one of the least-bound, ultracool dwarfs in multiple systems.

引用

页码：176 / 182

页数：7

共 61 条

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