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New HST Views at Old Stellar Systems

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The Impact of HST on European Astronomy

Part of the book series: Astrophysics and Space Science Proceedings ((ASSSP))

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Abstract

HST has recently revealed that many among the most massive globular clusters harbor multiple stellar populations, and — most surprisingly — some of them are extremely helium rich. How these clusters managed to generate such complex stellar populations, and what processes let to so dramatic helium enrichment, is today one of the most exciting puzzles in the astrophysics of stellar systems. HST has also been instrumental in demonstrating that both the bulge of our own Galaxy and that of M31 are dominated by old stellar populations, coeval to galactic globular clusters. Ultradeep HST imaging has also demonstrated that a major component of the M31 halo is metal rich and much younger than old globular clusters.

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Correspondence to Alvio Renzini .

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Renzini, A. (2010). New HST Views at Old Stellar Systems. In: Macchetto, F. (eds) The Impact of HST on European Astronomy. Astrophysics and Space Science Proceedings. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-3400-7_16

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  • DOI: https://doi.org/10.1007/978-90-481-3400-7_16

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-90-481-3399-4

  • Online ISBN: 978-90-481-3400-7

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