论文标题
在太阳能周期23和24期间的亚毫升活性区域过高的亮度温度
The Submillimeter Active Region Excess Brightness Temperature during Solar Cycles 23 and 24
论文作者
论文摘要
我们报告了超过太阳活性区（AR）的过度亮度温度的时间演变，该省毫米级望远镜（SST）在212（λ= 1.4 mm）和405 GHz（λ= 0.7 mm）的循环23和24期间观察到的时间演变，在23和24中观察到了405 GHz（λ= 0.7 mm）。比较与Sunspot Number（SSN）相比，Pearson的CORELERITY CORELITY CORELITY21。 分别。此外，当仅考虑周期24时，对于每个频率，相关系数为0.93和0.81。我们在SST频率之间得出光谱指数α，并发现与SSN有轻微的抗相关性（r = -0.25）；但是，由于变异的幅度低于标准偏差，因此我们无法得出明确的结论。实际上，α在不确定性内几乎保持恒定，中位值的中位数近似于光厚的热源的0特征。由于AR亚毫升辐射的起源是在色球高度下产生的热连续体，因此过量亮度温度与磁性周期演化之间的强相关性可能与在重新连接事件中释放的可用的自由磁能有关。
We report the temporal evolution of the excess brightness temperature above solar active regions (ARs) observed with the Solar Submillimeter Telescope (SST) at 212 (λ = 1.4 mm) and 405 GHz (λ = 0.7 mm) during Cycles 23 and 24. Comparison with the sunspot number (SSN) yields a Pearson's correlation coefficient R = 0.88 and 0.74 for 212 and 405 GHz, respectively. Moreover, when only Cycle 24 is taken into account the correlation coefficients go to 0.93 and 0.81 for each frequency. We derive the spectral index α between SST frequencies and found a slight anti-correlation with the SSN (R = -0.25); however, since the amplitude of the variation is lower than the standard deviation we cannot draw a definite conclusion. Indeed, α remains almost constant within the uncertainties with a median value approximate to 0 characteristic of an optically thick thermal source. Since the origin of the AR submillimeter radiation is thermal continuum produced at chromospheric heights, the strong correlation between the excess brightness temperature and the magnetic cycle evolution could be related to the available free magnetic energy to be released in reconnection events.
