A comment on the metal abundance of the globular cluster M71

Details A comment on the metal abundance of the globular cluster M71 A comment on the metal abundance of the globular cluster M71

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...255..122b&link_type=abstract

Astrophysical Journal, Part 1, vol. 255, Apr. 1, 1982, p. 122-127. Research supported by the Statens Naturvetenskapliga Forskni

Astronomy and Astrophysics

Astrophysics

29

Abundance, Astronomical Photometry, Astronomical Spectroscopy, Globular Clusters, Metals, Red Giant Stars, Atmospheric Models, Doppler Effect, Spectrophotometry, Stellar Evolution

Scientific paper

A new estimate of the metal abundance of the globular cluster M71 is derived based on the echelle spectra obtained by Cohen (1980) for four M71 red giants and the application of synthetic colors to the interpretation of available photometry. The colors used are the DDO colors of Bell and Gustafsson (1978), and colors for the Searle and Zinn (1978) system computed from the same synthetic spectra as the DDO colors. Photometric data yield a value for the metal abundance of M71 of about -0.6, whereas a reanalysis of Cohen's data yields a value of about -0.9 or less. Possible explanations for the discrepancy are suggested, and future studies which may serve to determine the correct explanation are pointed out.

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