The calcium abundance in NGC 3201

Details The calcium abundance in NGC 3201 The calcium abundance in NGC 3201

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pasp..101...40r&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 101, Jan. 1989, p. 40-44.

Astronomy and Astrophysics

Astronomy

6

Abundance, Calcium, Galactic Clusters, Globular Clusters, Balmer Series, K Lines, Metallicity, Stellar Spectra

Scientific paper

Spectra of 15 horizontal-branch stars in the galactic globular cluster NGC 3201 are analyzed to determine the value of the Ca/H abundance ratio and the color excess, E(B - V). It is found that the cluster is reddened by E(B - V) = 0.31 + or - 0.03, in good agreement with a recent determination from the integrated properties by Reed et al. (1988). The Ca/H abundance ratio derived from equivalent-width measurements of Ca II K and Balmer lines, is found to be -1.37 + or - 0.25, i.e., less than one-half that of NGC 1851, a cluster with a similar apparently retrograde orbit.

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