Ages of globular clusters derived from BVRI CCD photometry

Title:

Ages of globular clusters derived from BVRI CCD photometry

Creator:

Alcaino, Gonzalo and Liller, William

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:2441e3a3-f883-4520-bd0d-ca1a1b69bd0e
uuid:2441e3a3-f883-4520-bd0d-ca1a1b69bd0e

Subject:

space research, photometry, and globular clusters

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The modern generation of electronic detectors, such as the CCD, have made improved photometry possible, especially at magnitudes near photographic plate limits and at wavelengths extending to the near infrared. Vigorous efforts should now be made to extend measurements to longer wavelengths since VandenBerg and Bell (1985) have recently calculated BVRI synthetic isochrones. Consequently, we have embarked on a program of CCD BVRI photometry for determining the ages of globular clusters. From BVRI CCD frames obtained with the 1.54 Danish telescope at ESO-La Silla we have at this moment completed the reductions of the following 5 globular clusters: NGC 104 (47 Tuc), NGC 2298, NGC 5139 ( 0) Cen), NGC 6121 (M4), and NGC 6362. For these clusters, we have derived ages all close to 17x10^0y. Providing strong evidence that the globular cluster system is coeval, and that the epoch of the galactic contraction was short.

Language:

Czech

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

193-197

Source:

Publications of the Astronomical Institute of the Academy of Sciences of the Czech Republic | 1987 Volume:63-70 | Number:69

Harvested from:

CDK

Metadata only:

false