B, V PHOTOMETRY FOR ∼19,000 STARS IN AND AROUND THE MAGELLANIC CLOUD GLOBULAR CLUSTERS NGC 1466, NGC 1841, NGC 2210, NGC 2257, AND RETICULUM

被引:5
作者
Jeon, Young-Beom [1 ,2 ]
Nemec, James M. [3 ,4 ]
Walker, Alistair R. [5 ]
Kunder, Andrea M. [5 ]
机构
[1] Korea Astron & Space Sci Inst, Taejon 305348, South Korea
[2] Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Taegu 702701, South Korea
[3] Camosun Coll, Dept Phys & Astron, Victoria, BC V8P 5J2, Canada
[4] Int Stat & Res Corp, Brentwood Bay, BC V8M 1R3, Canada
[5] Cerro Tololo Interamer Observ, Natl Opt Astron Observ, La Serena, Chile
关键词
galaxies: star clusters: general; globular clusters: individual (NGC 1466; NGC; 1841; 2210; 2257; Reticulum); Magellanic Clouds; RR-LYRAE STARS; GRAVITATIONAL LENSING EXPERIMENT; PHOTOELECTRIC UBVRI SEQUENCES; COLOR-MAGNITUDE DIAGRAMS; OGLE-III CATALOG; VARIABLE-STARS; FREQUENCY-ANALYSIS; STANDARD STARS; LMC; INVENTORY;
D O I
10.1088/0004-6256/147/6/155
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Homogeneous B, V photometry is presented for 19,324 stars in and around 5 Magellanic Cloud globular clusters: NGC 1466, NGC 1841, NGC 2210, NGC 2257, and Reticulum. The photometry is derived from eight nights of CCD imaging with the Cerro Tololo Inter-American Observatory 0.9 m SMARTS telescope. Instrumental magnitudes were transformed to the Johnson B, V system using accurate calibration relations based on a large sample of Landolt-Stetson equatorial standard stars, which were observed on the same nights as the cluster stars. Residual analysis of the equatorial standards used for the calibration, and validation of the new photometry using Stetson's sample of secondary standards in the vicinities of the five Large Magellanic Cloud clusters, shows excellent agreement with our values in both magnitudes and colors. Color-magnitude diagrams reaching to the main-sequence turnoffs at V similar to 22 mag, sigma-magnitude diagrams, and various other summaries are presented for each cluster to illustrate the range and quality of the new photometry. The photometry should prove useful for future studies of the Magellanic Cloud globular clusters, particularly studies of their variable stars.
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页数:13
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