Models of mu Her with asteroseismic constraints

作者：Yang Wuming^*; Meng Xiangcun

来源：New Astronomy, 2010, 15(4): 367-372.

DOI：10.1016/j.newast.2009.11.001

• Stars: individual: mu Her
• Stars: evolution
• Stars: oscillations

Using the Yale stellar evolution code, models of mu Her based on asteroseismic measurements are constructed. A chi(2) minimization is performed to approach the best modeling parameters which reproduce the observations within their errors. By combining all non-asteroseismic constraints with asteroseismic measurements, we find that the observational constraints favour a model with a mass of 1.00(-0.02)(+0.01) M(circle dot), an age t = 6.433 +/- 0.04 Gyr, a mixing-length parameter alpha = 1.75 +/- 0.25, an initial hydrogen abundance X(i) = 0.605(-0.005)(+0.01) and metal abundance Z(i) = 0.0275(-0.001)(+0.002). mu Her is in post-main sequence phase of evolution. The modes of l = 1 show up the characteristics of avoided crossings. which may be applied to test the internal structure of this type stars. Asteroseismic measurements can be used as a complementary constraint on the modeling parameters. The models with mass 1.00-1.10 M(circle dot) can reproduce the observational constraints. Existing observed data of it Her do not rule out these models.

• 出版日期2010-4
• 单位河南理工大学