论文标题
潮汐引起的恒星振荡：将热木星激发的建模振荡转换为可观察
Tidally induced stellar oscillations: converting modelled oscillations excited by hot Jupiters into observables
论文作者
论文摘要
我们计算从恒星上的热木星潮汐诱导的非绝热的非辐射振荡到可观察到的光谱和光度信号的转化。讨论了冷冻对流和近似值的模型，以使对流通量扰动。计算出一些实际行星系统的可观察结果，以提供特定的预测。在运输过程中，依赖时间依赖性线宽图和径向速度信号均作为对恒星振荡性质的进一步见解的方法进行了研究。如在平衡潮汐近似值中的轨道时期$ p^{ - 2} $的光度信号与轨道周期的反平方成正比。但是，径向速度信号被预测与$ p^{ - 1} $相对，因此在长轨道周期中比对应于平衡潮汐近似的信号大得多，该信号与$ p^{ - 3} $成正比。讨论了检测这些振荡的前景以及对行星检测和表征的影响。
We calculate the conversion from non-adiabatic, non-radial oscillations tidally induced by a hot Jupiter on a star to observable spectroscopic and photometric signals. Models with both frozen convection and an approximation for a perturbation to the convective flux are discussed. Observables are calculated for some real planetary systems to give specific predictions. Time-dependent line broadening and the radial velocity signal during transit are both investigated as methods to provide further insight into the nature of the stellar oscillations. The photometric signal is predicted to be proportional to the inverse square of the orbital period, $P^{-2}$, as in the equilibrium tide approximation. However, the radial velocity signal is predicted to be proportional to $ P^{-1}$, and is therefore much larger at long orbital periods than the signal corresponding to the equilibrium tide approximation, which is proportional to $P^{-3}$. The prospects for detecting these oscillations and the implications for the detection and characterisation of planets are discussed.
