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(Reference retrieved automatically from Google Scholar through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The old open clusters Berkeley 36, Berkeley 73 and Biurakan 13 (Berkeley 34)

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Author(s):
Ortolani, S. ; Bica, E. ; Barbuy, B. [3] ; Zoccali, M.
Total Authors: 4
Document type: Journal article
Source: Astronomy & Astrophysics; v. 429, n. 2, p. 607-612, 2005.
Field of knowledge: Physical Sciences and Mathematics - Astronomy
Abstract

BV photometry of the faint open clusters Berkeley 36, Berkeley 73 and Biurakan 13 are studied. For these clusters no colour-magnitude analyses were previously available. The colour-magnitude Diagrams indicate that they are all old open clusters. The derived ages are ˜4 Gyr for Berkeley 36, and ˜2.3 Gyr for both Berkeley 73 and Biurakan 13. The clusters are not very reddened, with E(B-V) = 0.25, 0.10 and 0.30 respectively for Berkeley 36, Berkeley 73 and Biurakan 13. Berkeley 36 and Berkeley 73 are located at a distance from the Galactic center of ˜10 kpc, while Biurakan 13 is much farther, at 15 kpc. A peak in the age distribution appears at 5 Gyr suggesting a distinct star forming event in the disk. (AU)

FAPESP's process: 00/10406-4 - Chemical evolution and stellar populations of the galaxy, magellanic clouds and elliptical galaxies, based on spectroscopy and imaging
Grantee:Beatriz Leonor Silveira Barbuy
Support type: Research Projects - Thematic Grants