论文标题
关于恒星时代的新见解。陀螺仪和旋转的理论趋势
A new insight on stellar age I. Theoretical trends with gyro-age and rotation
论文作者
论文摘要
在第一份工作中，试图分析解释对磁制动指数的影响，即$ q $，这是由主要序列恒星中恒星速度演变而成的，并由de Freitas \＆de Medeiros（2013）估算的。我们发现，$ q $的效果在这里是理解控制恒星旋转的微妙机制的决定因素，这是恒星质量的函数。我们注意到，我们的模型预测，计算出的年龄与陀螺仪年龄不同。实际上，仅考虑Skumanich关系的规范值（$ Q $ = 3）的规范值，可以测量陀螺仪。结果，我们发现，当$ q $是免费参数时，恒星的年龄可以确定。我们还验证了旋转期为$ \ sim $ 5天（即快速旋转器），不同索引$ q $之间存在很大的差异。另外，根据所选质量范围，可以低估通过旋律学模型测量的年龄。总之，我们建议通过磁制动指数的广义陀螺仪可以更好地理解旋转作为时钟的概念的有趣方法。
In this first work attempts to analytically explain the effects on the magnetic braking index, $q$, caused by the evolution of stellar velocity in main-sequence stars, and estimated by de Freitas \& De Medeiros (2013). We have found that the effect of $q$ is here a determining factor for understanding the delicate mechanisms that control the spin-down of stars as a function of the mass of stars. We note that our models predict that the calculated ages are distinct from gyrochronology ages. Indeed, the gyro-ages are measured considering only the canonical value of the Skumanich relation ($q$=3). As a result, we find that the age of stars can be well-determined when $q$ is free parameter. We also verified that for rotation periods less than $\sim$ 5 days (i.e., fast rotators) there is a strong discrepancy among the different indexes $q$. In addition, the ages measured by gyrochronology model can be underestimated according to mass range selected. In conclusion, we suggest that the generalized gyro-ages by magnetic braking index can be an interesting way to better understand the idea of rotation as a clock.
