由$\varepsilon$机制引起的贫金属低质量主序星的偶极低阶g模不稳定性
Dipole low-order g mode instability of metal-poor low-mass main-sequence stars due to the $\varepsilon$-mechanism
摘要：
我们分析了贫金属低质量主序星由于$\varepsilon$ -机制的振动稳定性。由于贫金属恒星的外对流区仅限于最外层，因此对流处理的不确定性不会对结果产生显著影响。我们发现，由于$Z\la 6\times 10^{-4}$的$\varepsilon$ -机制，偶极g $_1$ -和g $_2$ -模式肯定变得不稳定。此外，我们发现随着金属丰度的降低，$\varepsilon$机制不稳定性的质量范围向更高的质量扩展。
英文摘要：
We analyzed vibrational stability of metal-poor low-mass main-sequence stars due to the $\varepsilon$-mechanism. Since outer convection zones of the metal-poor stars is limited only to the very outer layers, the uncertainty in treatment of convection does not affect the result significantly. We found that the dipole g$_1$- and g$_2$-modes certainly become unstable due to the $\varepsilon$-mechanism for $Z\la 6\times 10^{-4}$. Besides that, we found that as the metallicity decreases the mass range of the $\varepsilon$-mechanism instability extends toward higher mass.
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