论文标题
旋转的对流核心激发非拉迪脉冲引起早期型星的旋转调制
Rotating Convective Core Excites Non-Radial Pulsations to Cause Rotational Modulations in Early-Type Stars
论文作者
论文摘要
我们讨论通过在早期型主序列恒星中旋转对流芯中具有弱不稳定的对流模式的谐振耦合激发的低频G模式。我们的非绝热脉动分析包括$ 2 \，m_ \ odot $ main序列模型的效果，表明，如果对流芯旋转的速度比周围的辐射层稍快，则辐射构模式中的G模式会受到谐振耦合的激发。惯性框架中激发G模式的频率接近$ |mΩ_{\ rm c} | $，带有$ m $，$ m $和$ω_ {\ rm c} $是G模式的方位顺序和对流核心的旋转频率。这些G模式频率与在许多早期型主序列恒星中观察到的光度旋转调制和谐波的频率一致。
We discuss low-frequency g modes excited by resonant couplings with weakly unstable oscillatory convective modes in the rotating convective core in early-type main-sequence stars. Our non-adiabatic pulsation analyses including the effect of Coriolis force for $2\,M_\odot$ main-sequence models show that if the convective core rotates slightly faster than the surrounding radiative layers, g modes in the radiative envelope are excited by a resonance coupling. The frequency of the excited g mode in the inertial frame is close to $|mΩ_{\rm c}|$ with $m$ and $Ω_{\rm c}$ being the azimuthal order of the g mode and the rotation frequency of the convective core, respectively. These g mode frequencies are consistent with those of photometric rotational modulations and harmonics observed in many early-type main-sequence stars.
