CCD PHOTOMETRY IN VRI BANDS OF THE GALACTIC CLUSTER NGC-2818

被引：4
作者：
SURENDIRANATH, R
RAO, NK
SAGAR, R
NATHAN, JS
GHOSH, KK
机构：
[1] Indian Institute of Astrophysics, Bangalore
来源：
JOURNAL OF ASTROPHYSICS AND ASTRONOMY | 1990年 / 11卷 / 02期
关键词：
open clusters; individual:; NGC; 2818; planetary nebulae; stellar evolution; VRI photometry;
D O I：
10.1007/BF02715014
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The open cluster NGC 2818 containing a planetary nebula has been observed in VRI bands using the CCD system at prime focus of the 2.3-metre Vainu Bappu Telescope. The study extending to stars V ∼ 21 magnitude establishes the distance modulus as (m-M) 0 = 12.9 ±0.1 for the cluster. Based on the fitting of theoretical isochrones computed for solar metallicity, an age of 5(±1) × 108 years has been assigned to the cluster. Association of the planetary nebula with the cluster indicates that the progenitor mass of the planetary nebula on the main sequence is ≥2.5M⊙ © 1990 Indian Academy of Sciences.
引用
收藏
页码：151 / 166
页数：16
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