SPACE MOTIONS OF GLOBULAR-CLUSTERS NGC-362 AND NGC-6218 (M12)

被引:30
作者
BROSCHE, P
TUCHOLKE, HJ
KLEMOLA, AR
NINKOVIC, S
GEFFERT, M
DOERENKAMP, P
机构
[1] UNIV MUNSTER,INST ASTRON,W-4400 MUNSTER,GERMANY
[2] UNIV CALIF SANTA CRUZ,UNIV CALIF OBSERV,LICK OBSERV,BOARD STUDIES ASTRON & ASTROPHYS,SANTA CRUZ,CA 95064
关键词
D O I
10.1086/116024
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We measured the absolute proper motions of NGC 6218 (M12) against distant galaxies and of NGC 362 against stars of the Small Magellanic Cloud (typical accuracy +/- 0".13 cent-1). The results are combined with those of the two studied clusters NGC 4147 and NGC 5466. A variety of parameters is determined within the approximation of a simple Galactic potential, including the description of the last transits of the clusters through the main plane of the Galaxy. The path of the orbits in a meridional section (based on a more refined potential) is provided for the last 10(10) yr. We would like to draw attention to orbits with north-south asymmetry, as exemplified by the tube orbit of NGC 4147.
引用
收藏
页码:2022 / 2027
页数:6
相关论文
共 28 条
[1]  
ALLEN C, 1988, REV MEX ASTRON ASTR, V16, P25
[2]   MAIN-SEQUENCE CCD PHOTOMETRY OF THE GLOBULAR-CLUSTER NGC-362 [J].
BOLTE, M .
ASTROPHYSICAL JOURNAL, 1987, 315 (02) :469-479
[3]  
BORSCHE P, 1985, AJ, V90, P2033
[4]  
BROSCHE P, 1983, PUBL ASTRON I CZECH, V56, P145
[5]  
CONTOPOULOS G, 1967, B ASTR PARIS 3, V2, P223
[6]  
GEFFERT M, 1987, ESO C WORKSHOP P GAR, V27, P351
[7]  
GEFFERT M, 1991, IN PRESS A AS
[8]   LICK NORTHERN PROPER MOTION PROGRAM .2. SOLAR MOTION AND GALACTIC ROTATION [J].
HANSON, RB .
ASTRONOMICAL JOURNAL, 1987, 94 (02) :409-415
[9]   RADIAL-VELOCITIES OF STARS IN M12 (NGC 6218) AND M56 (NGC 6779) AND UV-BRIGHT STARS IN GLOBULAR-CLUSTERS [J].
HARRIS, HC ;
NEMEC, JM ;
HESSER, JE .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1983, 95 (566) :256-263