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Science in China Series A: Mathematics

, Volume 41, Issue 8, pp 869–877 | Cite as

Relations of core mass-stellar luminosity and core mass-stellar radius for AGB and FGB stars

  • Zhanwen Han
Article
  • 137 Downloads

Abstract

The relations between core mass and stellar luminosity and radius for AGB and FGB stars are systematically investigated with the latest stellar models. A single unique relation between the core mass and giant’s luminosity is obtained. The core mass-giant’s radius relations are given for both Pop I and Pop II stars. The core mass-giant’s luminosity relation is almost independent of the stellar parameters, such as stellar metallicity, mixing length parameter α, and stellar winds. The core mass-giant’s radius relation is somewhat affected by the parameters. The giant’s radius at anM c (core mass) for Pop II is smaller than that for Pop I (by a factor of ≈ 1.5). A larger mixing length parameter α also tends to reduce the giant’s radius.

Keywords

evolution basic relations AGB FGB 

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Copyright information

© Science in China Press 1998

Authors and Affiliations

  • Zhanwen Han
    • 1
    • 2
  1. 1.Centre for AstrophysicsUniversity of Science and Technology of ChinaHefeiChina
  2. 2.Yunnan ObservatoryChinese Academy of SciencesKunmingChina

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