BVRI CCD photometry of the metal-poor globular cluster NGC 4372

Journal Article · Mon Jul 01 00:00:00 EDT 1991 · Astronomical Journal; (United States)

DOI:https://doi.org/10.1086/115864· OSTI ID:5194239

Alcaino, G; Liller, W; Alvarado, F; Wenderoth, E ^[1]

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1. Ministerio de Educacion de Chile, Instituto Isaac Newton, Santiago (Chile)

BVRI CCD photometry is presented in two overlapping fields in the metal-poor globular cluster NGC 4372. The observations extend approximately 2 mag below the main-sequence turnoff to V about 21. By comparing the color-magnitude diagram (CMD) with those of clusters with similar metallicities, it is found that E(B-V) = 0.50 {plus minus} 0.03, and (m-M)v = 14.75 {plus minus} 0.06. Comparison with theoretical isochrones leads to a value E(B-V) = 0.53 {plus minus} 0.03. Comparison of the CMD with that of bright stars published by other authors yields a value for Delta V(TO-HB) = 3.3 {plus minus} 0.3. The weighted mean value of the age of the cluster, derived from the four colors, is 15 {plus minus} 4 Gyr (estimated external uncertainty). 17 refs.

• OSTI ID: 5194239
• Journal Information: Astronomical Journal; (United States), Vol. 102; ISSN 0004-6256
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
STAR CLUSTERS
PHOTOMETRY
AGE ESTIMATION
CHEMICAL COMPOSITION
COLOR
COMPARATIVE EVALUATIONS
DIAGRAMS
MAIN SEQUENCE STARS
EVALUATION
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHYSICAL PROPERTIES
STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources