Using a generalized function of the stellar spin-down law, we investigate the age dependence of the magnetic braking index (q). Our survey includes 9 open clusters aged lower than 1 Gyr and ranged in mass from 0.7 to 1.1. Our aim is to verify the time behaviour of the nonextensive braking index q which brings the cumulative distribution of the rotational velocities of the stars of the youngest cluster taken at the future age of an older cluster. As a result, the q-index is calculated over time , where t is the age of older open cluster used to estimate the future cumulative distribution of the rotational velocity of the cluster with present-day age . We find that the values of q are slightly constant around 1.36 and 1.38 according to the mass bin. In conclusion, the results seem to indicate that the mechanism that controls the rotational decay of stars in open clusters does not depend on the increment of time.

使用恒星自旋下降定律的广义函数，我们研究了磁制动指数 ( q )的年龄依赖性。我们的调查包括 9 个年龄低于 1 Gyr 且质量范围从 0.7 到 1.1 的疏散星团。我们的目标是验证非扩展制动指数q的时间行为，该指数带来了在较旧星团未来年龄所采取的最年轻星团恒星旋转速度的累积分布。因此，q- index 是随时间计算的，其中t是较旧的疏散星团的年龄，用于估计星团旋转速度与当前年龄的未来累积分布. 我们发现，根据质量箱，q的值在 1.36 和 1.38 附近略微恒定。总之，结果似乎表明控制疏散星团中恒星旋转衰变的机制不依赖于时间的增加。