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

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Publications of the Astronomical Society of the Pacific; (USA)

DOI:https://doi.org/10.1086/132442· OSTI ID:5470206

Eggen, O J ^[1]

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1. Observatorio Interamericano de Cerro Tololo, La Serena (Chile)

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. 59 refs.

• OSTI ID: 5470206
• Journal Information: Publications of the Astronomical Society of the Pacific; (USA), Journal Name: Publications of the Astronomical Society of the Pacific; (USA) Vol. 101; ISSN PASPA; ISSN 0004-6280
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
AGE ESTIMATION
CATALOGS
CHEMICAL COMPOSITION
DOCUMENT TYPES
ELEMENTS
GIANT STARS
HYDROGEN
IRON
METALS
NONMETALS
PHOTOMETRY
STAR CLUSTERS
STARS
TRANSITION ELEMENTS