Photometric study of the old galactic cluster Be 31

Details Photometric study of the old galactic cluster Be 31 Photometric study of the old galactic cluster Be 31

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106..220g&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 106, no. 1, p. 220-228, 412.

Astronomy and Astrophysics

Astronomy

8

Astronomical Photometry, Color-Color Diagram, Color-Magnitude Diagram, Galactic Clusters, Open Clusters, Ubv Spectra, Chemical Evolution, Interstellar Extinction, Interstellar Matter, Metallicity

Scientific paper

CCD photometry on the Johnson UBV and on the Kron-Cousins VI systems are presented for 732 stars in and near Be 31, an open cluster located towards the Galactic anticenter. The resultant color-magnitude diagrams indicate that the cluster is an old object. From the color-color diagram, the reddening and metallicity parameters are determined to be E(B-V) = 0.13 mag and (Fe/H) = -0.4. By comparing the cluster C-M diagrams with the VandenBerg isochrones, and by assuming a normal reddening law, a distance of 5.24 +/- 0.5 kpc and an age of 8 Gyr are derived.

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