耀斑星Proxima Centauri上的中等磁场
The moderate magnetic field on the flare star Proxima Centauri
摘要：
我们报告了在附近的M5.5耀斑恒星Proxima Centauri上的中等磁通量为450 G < Bf <750 G（3 sigma）。利用高分辨紫外可见光谱测量了FeH分子在1 μ m附近吸收线塞曼展宽的磁通量。我们发现的磁通量与经典的强耀斑星相比相对较弱，但比邻星的耀斑速率和实际发射水平也是如此。我们比较什么是已知的旋转速率，Rossby数，在这颗恒星的活动水平，这些数量之间的关系，最近已被开发更普遍的M矮星。我们的结论是，磁通量是高于最好的估计Rossby数从周期测量。另一方面，比邻星的活动水平处于基于测量场的预期的高端，但不会高到超过这些关系中的自然散射（其他恒星也位于这个高包络线上）。
英文摘要：
We report moderate magnetic flux of 450G < Bf < 750G (3sigma) on the nearby M5.5 flare star Proxima Centauri. A high resolution UVES spectrum was used to measure magnetic flux from Zeeman broadening in absorption lines of molecular FeH around 1mu. The magnetic flux we find is relatively weak compared with classical strong flare stars, but so are Proxima's flaring rates and actual emission levels. We compare what is known about the rotation rate, Rossby number, and activity levels in this star to relations between these quantities that have been recently being developed more generally for M dwarfs. We conclude that the magnetic flux is higher than the best estimates of the Rossby number from period measurements. On the other hand, the activity levels on Proxima Centauri are at the high end of what could be expected based on the measured field, but not so high as to exceed the natural scatter in these relations (other stars lie along this high envelope as well).
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
