论文标题
太阳能近距离二进制恒星中的潮汐发电机
Tidal dynamo in solar-like close binary stars
论文作者
论文摘要
热对流通常被认为是恒星或行星发电机的能源。在这篇简短的论文中，我们提供了另一种可能性，即大规模的潮流。在近距离二进制恒星中，例如，在2或3天的轨道周期的太阳能恒星中，大规模的潮汐流比对流流相当甚至更强，并且可以诱导磁力动力。基于发电机方程和潮汐理论，我们估算了由大规模潮汐流诱导的磁能，该磁能与轨道频率的立方体成正比。我们的估计可以通过对近二进制恒星的未来光谱观测和数值模拟来测试。
Thermal convection is commonly believed to be the energy source of stellar or planetary dynamo. In this short paper we provide another possibility, namely large-scale tidal flow. In close binary stars, say, solar-like stars with orbital period at 2 or 3 days, large-scale tidal flow is comparable to or even stronger than convective flow, and it can induce magnetic dynamo action. Based on dynamo equation and tidal theory we estimate the magnetic energy induced by large-scale tidal flow, which is proportional to the cube of orbital frequency. Our estimation can be tested by the future spectropolarimetric observations and numerical simulations for close binary stars.
