The origin of the quiet Sun magnetism is under debate. Investigating the solar cycle variation observationally in more detail can give us clues about how to resolve the controversies. We investigate the solar cycle variation of the most magnetically quiet regions and their surface gravity oscillation ($f$-) mode integrated energy ($E_f$). We use 12 years of HMI data and apply a stringent selection criteria, based on spatial and temporal quietness, to avoid any influence of active regions (ARs). We develop an automated high-throughput pipeline to go through all available magnetogram data and to compute $E_f$ for the selected quiet regions. We observe a clear solar cycle dependence of the magnetic field strength in the most quiet regions containing several supergranular cells. For patch sizes smaller than a supergranular cell, no significant cycle dependence is detected. The $E_f$ at the supergranular scale is not constant over time. During the late ascending phase of Cycle 24 (SC24, 2011-2012), it is roughly constant, but starts diminishing in 2013, as the maximum of SC24 is approached. This trend continues until mid-2017, when hints of strengthening at higher southern latitudes are seen. Slow strengthening continues, stronger at higher latitudes than at the equatorial regions, but $E_f$ never returns back to the values seen in 2011-2012. Also, the strengthening trend continues past the solar minimum, to the years when SC25 is already clearly ascending. Hence the $E_f$ behavior is not in phase with the solar cycle. The anticorrelation of $E_f$ with the solar cycle in gross terms is expected, but the phase shift of several years indicates a connection to the poloidal large-scale magnetic field component rather than the toroidal one. Calibrating AR signals with the QS $E_f$ does not reveal significant enhancement of the $f$-mode prior to AR emergence.
翻译:静悄悄的太阳磁力学起源正在辩论之中。 更详细地调查太阳周期变异性可以给我们如何解决争议的线索。 我们调查最磁性安静地区的太阳周期变化及其表面重力振动模式的太阳周期变化( f$- 美元 美元 美元 美元 美元 美元 ) 。 我们使用12年的HMI数据并应用严格的选择标准, 以空间和时间的平静性为基础, 以避免活动地区的任何影响 。 我们开发了一个自动的高通量管道, 以通过所有可用的磁图数据, 为选定的安静地区计算 $_ f 美元 。 我们观察到最安静地区( 包含多个超级凝聚细胞) 的磁场强度的太阳周期变化。 我们使用12年的HMI数据并应用了严格的选择标准, 以避免活动地区的空间和时间的平静性变化。 我们开发了一个自动高通量的管道, 要通过所有可用的磁力数据, 要计算出美元 $_ f 美元 。 但是随着 SC24 最高值的接近, 我们观察到磁场的太阳周期的太阳周期依赖度, 这个趋势将持续持续到2017年中, 美元 水平的温度将持续上升 。