BVRI CCD photometry of the metal-poor globular cluster M68 (NGC 4590)
- Ministerio de Educacion de Chile, Santiago (Chile)
BVRI photometry of the low metallicity globular cluster M68 (NGC 4590) was obtained with a CCD camera and the 2.2-m ESO telescope. The resulting BV color-magnitude diagrams are compared with the observations of McClure et al. (1987). The observations are also compared with theoretical isochrones, yielding a cluster age of 13 Gyr with a likely external uncertainty of 2 or 3 Gyr. 25 refs.
- OSTI ID:
- 6692221
- Journal Information:
- Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 99; ISSN 0004-6256; ISSN ANJOA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AGE ESTIMATION
CHARGE-COUPLED DEVICES
CHEMICAL COMPOSITION
COLOR
COMPARATIVE EVALUATIONS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHOTOMETRY
PHYSICAL PROPERTIES
SEMICONDUCTOR DEVICES
STAR CLUSTERS
TELESCOPES
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AGE ESTIMATION
CHARGE-COUPLED DEVICES
CHEMICAL COMPOSITION
COLOR
COMPARATIVE EVALUATIONS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHOTOMETRY
PHYSICAL PROPERTIES
SEMICONDUCTOR DEVICES
STAR CLUSTERS
TELESCOPES