论文标题
恒星爆发中的波动冲击：动力学，信封加热和新生的爆炸线
Wave-Driven Shocks in Stellar Outbursts: Dynamics, Envelope Heating, and Nascent Blastwaves
论文作者
论文摘要
我们解决了一般一维流中声脉冲和波浪列的冲击，重点是在巨大的恒星中应用超级 - 埃德丁顿爆发。使用近似绝热的不变剂，我们以其积分和差异形式概括了经典的相等区域技术。我们预测最初正弦但有限的波列的情况下的冲击演化，并具有单独的解决方案，可用于内部冲击，头部或尾部冲击，并与数值模拟一起详细一致。我们的内部冲击解决方案激发了冲击加热速率的提高表达式。我们对头部和尾部冲击的解决方案表明，这些解决方案可为大半径提供更多的波能量，并具有更大的直接弹出物质的潜力。这种差异突出了波形对于冲击动力学的重要性。我们的弱震分析预测何时冲击会变得强大，并提供了可以解决这种过渡的基础。我们使用它来估计突然的声音脉冲和弱中央爆炸弹出的质量。
We address the shocks from acoustic pulses and wave trains in general one-dimensional flows, with an emphasis on the application to super-Eddington outbursts in massive stars. Using approximate adiabatic invariants, we generalize the classical equal-area technique in its integral and differential forms. We predict shock evolution for the case of an initially sinusoidal but finite wave train, with separate solutions for internal shocks and head or tail shocks, and demonstrate detailed agreement with numerical simulations. Our internal shock solution motivates improved expressions for the shock heating rate. Our solution for head and tail shocks demonstrates that these preserve dramatically more wave energy to large radii and have a greater potential for the direct ejection of matter. This difference highlights the importance of the waveform for shock dynamics. Our weak-shock analysis predicts when shocks will become strong and provides a basis from which this transition can be addressed. We use it to estimate the mass ejected by sudden sound pulses and weak central explosions.
