Velocities and abundances of giant stars in the old open cluster NGC 2420

Details Velocities and abundances of giant stars in the old open cluster NGC 2420 Velocities and abundances of giant stars in the old open cluster NGC 2420

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....93..359s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 93, Feb. 1987, p. 359-367. Research supported by the Robert A. Welch Foundation.

Other

41

Abundance, Binary Stars, Giant Stars, Open Clusters, Radial Velocity, Stellar Spectra, Spectral Resolution, Stellar Luminosity

Scientific paper

Velocities and abundances derived from high-resolution, digital spectra have been determined for the four brightest giant stars in the old open cluster NGC 2420. The mean cluster velocity is +73 km s-1 and the overall iron abundance is found to be [Fe/H] = -0.57 relative to the Hyades giant γ Tau. All four giants are cluster members and two of the stars are confirmed to be barium stars. One of the stars is one of the most s-process and carbon-enriched barium stars yet studied. Both barium stars are binaries and show similar s-process abundance distributions; however, one star shows four times the overall s-process enhancement relative to the other.

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