Ruprecht 106 - A young metal-poor Galactic globular cluster

Details Ruprecht 106 - A young metal-poor Galactic globular cluster Ruprecht 106 - A young metal-poor Galactic globular cluster

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100.1811b&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 100, Dec. 1990, p. 1811-1840.

Other

86

Astronomical Photometry, Color-Magnitude Diagram, Galactic Clusters, Globular Clusters, Metallicity, Charge Coupled Devices, Milky Way Galaxy, Ubv Spectra

Scientific paper

The first CCD photometric survey in the Galactic globular cluster Ruprecht 106 has been performed. The results show that Ruprecht 106 is a metal-poor cluster with (Fe/H) about -2 located at about 25 kpc from the Galactic center. A sizable, high centrally concentrated population of blue stragglers was detected. Significant differences in the positions of the turnoffs in the color-magnitude diagram are found compared to those in metal-poor clusters. The cluster appears younger than other typical metal-poor Galactic globulars by about 4-5 Gyr; if true, this object would represent the first direct proof of the existence of a significant age spread among old, very metal-poor clusters.

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