The Composition of Horizontal Branch Stars in the Globular Cluster Messier 3

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Moderate resolution spectra of horizontal branch and lower giant branch stars in the globular cluster Messier 3 are analyzed to determine their compositions. The spectra were obtained using the Hydra fiber positioner and Bench Spectrograph on the WIYN 3.5-m telescope. The compositions are determined using fine analysis, and are compared to the compositions of stars on the upper giant branch. Radial velocity is used to confirm membership of the stars in M3.This material is based upon work supported by the National Science Foundation through an REU Site Program grant to Tennessee State University and Indiana University. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation."

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