KINEMATICS OF HOT SUBDWARFS

被引：0

作者：

COLIN, J

DEBOER, KS

DAUPHOLE, B

DUCOURANT, C

DULOU, MR

GEFFERT, M

LECAMPION, JF

MOEHLER, S

ODENKIRCHEN, M

SCHMIDT, JHK

THEISSEN, A

机构：

[1] UNIV BONN, STERNWARTE, D-53121 BONN, GERMANY

[2] OBSERV BORDEAUX, CNRS, URA 352, F-33270 FLOIRAC, FRANCE

[3] LANDESSTERNWARTE HEIDELBERG, D-69117 HEIDELBERG, GERMANY

来源：

ASTRONOMY & ASTROPHYSICS | 1994年 / 287卷 / 01期

关键词：

SUBDWARFS; STARS; POPULATION-II; KINEMATICS; GALAXY; KINEMATICS AND DYNAMICS; ASTROMETRY;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first results from a larger project in which the kinematics of hot subdwarfs are investigated. Proper motions are being determined for blue halo stars based on Carte du Ciel and recent plates. These, together with radial velocities (new data are presented), distances (from the literature), and a mass model for the galaxy, lead to the determination of the space motions of these objects. The kinematics of hot subdwarfs will be used for a determination of the population membership of these stars. The present small sample shows subdwarfs with a kinematical behaviour very similar to that of disk globular clusters. One of the objects has an apparent orbit reaching to z > 8 kpc and is thus a candidate Population 11 star; the other objects stay at z < 3 kpc.

引用

页码：38 / 42

页数：5

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