The origin of the lead-rich stars in the Galactic halo: investigation of model parameters for the s-process

  title={The origin of the lead-rich stars in the Galactic halo: investigation of model parameters for the s-process},
  author={Wenyuan Cui and B. Zhang Naoc and China Department of Physics and Hebei Normal University and China.},
  journal={Monthly Notices of the Royal Astronomical Society},
  • W. Cui, B. Z. Naoc, China.
  • Published 2 March 2006
  • Physics
  • Monthly Notices of the Royal Astronomical Society
Several stars at the low-metallicity extreme of the Galactic halo show large spreads of lead and associated 'heavy' s-process elements ([Pb/hs]). Theoretically, an s-process pattern should be obtained from an AGB star with a fixed metallicity and initial mass. For the third dredge-up and the s-process model, several important properties depend primarily on the core mass of AGB stars. Zijlstra reported that the initial-to-final mass relation steepens at low metallicity, due to low mass-loss… 

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