Globular Cluster and Galaxy formation: M31, The Milky Way, and Implications for Globular Cluster Systems of Spiral Galaxies

@article{Burstein2004GlobularCA,
  title={Globular Cluster and Galaxy formation: M31, The Milky Way, and Implications for Globular Cluster Systems of Spiral Galaxies},
  author={D. Burstein and Y. Li and K. Freeman and J. Norris and M. Bessell and J. Bland-Hawthorn and B. Gibson and M. Beasley and H. C. Lee and B. Barbuy and J. Huchra and J. Brodie and D. A. F. Asu and Anu and {\'A}{\`a}{\'o} and Swinburne and Sao Paolo and Smithsonian and Ucsc},
  journal={The Astrophysical Journal},
  year={2004},
  volume={614},
  pages={158-166}
}
We find that the globular cluster (GC) systems of the Milky Way and of our neighboring spiral galaxy, M31, comprise two distinct entities, differing in three respects. First, M31 has a set of young GCs, ranging in age from a few times 10 2 Myr to 5 Gyr old, as well as old GCs. No such very young GCs are known in the Milky Way. Second, we confirm that the oldest M31 GCs have much higher nitrogen abundances than do Galactic GCs at equivalent metallicities, while carbon abundances appear normal… Expand

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