Optical and near-infrared photometric study of NGC 6724

被引：0
|
作者：
Reda Bendary [1 ]
Ashraf Tadross [1 ]
Priya Hasan [2 ]
Anas Osman [1 ]
Ahmed Essam [1 ]
机构：
[1] National Research Institute of Astronomy & Geophysics
[2] Maulana Azad National Urdu University
来源：
ResearchinAstronomyandAstrophysics | 2018年 / 18卷 / 02期
关键词：
Milky Way; open clusters and associations: individual (NGC 6724); optical photometry; IR photometry; color-magnitude diagrams;
D O I：
暂无
中图分类号：
P154 [星团、星协、恒星云];
学科分类号：
摘要：
BVRI CCD photometry of the poorly studied open cluster NGC 6724 has been carried out down to a limiting magnitude of V ～20 mag. The stars of the cluster have been observed using the Newtonian focus(f/4.84) of the 74-inch telescope at Kottamia Astronomical Observatory in Egypt.Also, the 2 MASS-JHK system is used to confirm the results we obtained. The main photometric parameters have been estimated for the present object; the diameter is found to be 6 arcmin, the distance is 1530±60 pc from the Sun and the age is 900±50 Myr. The optical reddening E(B-V) = 0.65 mag,while the infrared reddening is E(J-H) = 0.20 mag. The slope of the mass function distribution and the relaxation time estimations indicate that cluster NGC 6724 is dynamically relaxed.
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页码：39 / 44
页数：6
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