A Comparison between Carbon and Nitrogen Abundances of Bright Giants in the Globular Clusters M13, M10, and NGC 7006

Details A Comparison between Carbon and Nitrogen Abundances of Bright Giants in the Globular Clusters M13, M10, and NGC 7006 A Comparison between Carbon and Nitrogen Abundances of Bright Giants in the Globular Clusters M13, M10, and NGC 7006

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aj....129.1589s&link_type=abstract

The Astronomical Journal, Volume 129, Issue 3, pp. 1589-1595.

Astronomy and Astrophysics

Astronomy

19

Galaxy: Globular Clusters: General, Galaxy: Globular Clusters: Individual: Messier Number: M13, Galaxy: Globular Clusters: Individual: Messier Number: M10, Galaxy: Globular Clusters: Individual: Ngc Number: Ngc 7006, Stars: Abundances

Scientific paper

Carbon and nitrogen abundances have been derived for red giants in the globular clusters M13, M10, and NGC 7006. These constitute a ``second-parameter'' trio of clusters having very similar metallicities ([Fe/H]~-1.55) but different horizontal-branch (HB) morphologies, with NGC 7006 having a much higher fraction of red HB stars than either M13 or M10. The red giants observed have absolute magnitudes in the range -2.5

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