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 lumin...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 an M 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.展开更多
文摘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 an M 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.
