摘要
星震学是探究恒星内部结构最直接有效的方法,本文根据最小二乘法,利用RGB星的一些震动参量得到了He核质量的一些拟合表达式,以及He核质量沿着RGB阶段的演化,所得结果跟观测结果相符,表明这些结果可以有效地用来定标RGB星的He核质量。进一步分析这些拟合表达式后,我们得到了一些新的星震参量与恒星参量的关系,比如:Δν=0.032ΔP^1/2ν^4/5 max,R/R⊙=2.3ΔP^1/3Δν^-3/2ν^2/3 max。
Asteroseismology is the most effective tool to directly probe the internal structure of RGB stars.According to the least-squares fitting method we obtain some fitting formulae of He core mass(M He)and the evolution of M He along RGB based on some asteroseismic parameters of RGB stars.The obtained results have a high agreement with observations,which shows that these formulae can be used to calibrate M He effectively.After some further analysises of the fitting formulae we obtain some new relations between asteroseismic and stellar parameters,for example,Δν=0.032ΔP^1/2ν^4/5 max,R/R⊙=2.3ΔP^1/3Δν^-3/2ν^2/3 max.
作者
赖祥军
曹玲玲
LAI Xiangjun;CAO Lingling(College of Electronic Engineering,Chengdu Technological University,Chengdu 611730,China)
出处
《西华师范大学学报(自然科学版)》
2019年第4期376-381,共6页
Journal of China West Normal University(Natural Sciences)
基金
国家自然科学基金项目(11403094)
成都工业学院人才引进项目(2017RC023)