Bimodal abundances in M 55?

Details Bimodal abundances in M 55? Bimodal abundances in M 55?

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...204..101r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 204, no. 1-2, Oct. 1988, p. 101-105.

Astronomy and Astrophysics

Astrophysics

8

Abundance, Astronomical Photometry, Globular Clusters, Red Giant Stars, Carbon, Metallicity

Scientific paper

Strömgren photometry on red giants in the globular cluster M55 (NGC
6809) has been performed. The average metallicity is -1.88 dex, as
derived from a calibration based on globular cluster giants. The
distribution of Strömgren colours shows a bimodal pattern which is
tentatively interpreted as an effect of bimodal carbon abundance.

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