Multiple Stellar Populations in Globular Clusters

  title={Multiple Stellar Populations in Globular Clusters},
  author={Nate Bastian and Carmela Lardo},
  journal={Annual Review of Astronomy and Astrophysics},
  • N. BastianC. Lardo
  • Published 4 December 2017
  • Physics
  • Annual Review of Astronomy and Astrophysics
Globular clusters (GCs) exhibit star-to-star variations in specific elements (e.g., He, C, N, O, Na, Al) that bear the hallmark of high-temperature H-burning. These abundance variations can be observed spectroscopically and also photometrically, with the appropriate choice of filters, due to the changing of spectral features within the band pass. This phenomenon is observed in nearly all of the ancient GCs, although, to date, it has not been found in any massive cluster younger than 2 Gyr. Many… 

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