Large and kinematically unbiased samples of G- and K-type stars. IV - Evolved stars of the old disk population

Details Large and kinematically unbiased samples of G- and K-type stars. IV - Evolved stars of the old disk population Large and kinematically unbiased samples of G- and K-type stars. IV - Evolved stars of the old disk population

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pasp..101..366e&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 101, April 1989, p. 366-416.

Astronomy and Astrophysics

Astronomy

67

Astronomical Photometry, G Stars, Giant Stars, K Stars, Late Stars, Star Distribution, Astronomical Catalogs, F Stars, Heavy Elements, Star Clusters

Scientific paper

Modified Stromgren and (R,I) photometry, along with DDO and Geneva photometry, are presented for a complete sample of evolved old-disk G and K giants in the Bright Star Catalogue. Stars with ages of between 1.5 x 10 to the 9th and 10 to the 10th yr are found to have a near-normal distribution of heavy element abundances, centered on an Fe/H abundance ratio of -0.1 dex. The old disk clusters NGC 3680 and IC 4651 contain red-straggler young-disk giants that are probably contemporaries of the blue stragglers in the clusters.

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