Deep and wide photometry of two open clusters NGC 1245 and NGC 2506: dynamical evolution and halo

被引：12

作者：

Lee, S. H. ^{[1
]}

Kang, Y. -W. ^{[1
]}

Ann, H. B. ^{[2
]}

机构：

[1] Korea Astron & Space Sci Inst, Taejon 305348, South Korea

[2] Pusan Natl Univ, Dept Earth Sci Educ, Pusan 609735, South Korea

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2013年 / 432卷 / 02期

关键词：

methods: observational; methods: statistical; techniques: photometric; open clusters and associations: individual: NGC 1245; open clusters and associations: individual: NGC 2506; GALACTIC OPEN CLUSTERS; OPEN STAR-CLUSTERS; CCD PHOTOMETRY; HYADES; TAILS; AGE;

D O I：

10.1093/mnras/stt588

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We studied the structure of two old open clusters, NGC 1245 and NGC 2506, from a wide and deep VI photometry data acquired using the CFH12K CCD camera at Canada-France-Hawaii Telescope. We devised a new method for assigning cluster membership probability to individual stars using both spatial positions and positions in the colour-magnitude diagram. From analyses of the luminosity functions at several cluster-centric radii and the radial surface density profiles derived from stars with different luminosity ranges, we found that the two clusters are dynamically relaxed to drive significant mass segregation and evaporation of some fraction of low-mass stars. There seems to be a signature of tidal tail in NGC 1245 but the signal is too low to be confirmed.

引用

页码：1672 / 1679

页数：8