The suitability of solar pores as magnetic wave guides has been a key topic of discussion in recent years. Here, we present observational evidence of propagating magnetohydrodynamic wave activity in a group of five photospheric solar pores. Employing data obtained by the Facility Infrared Spectropolarimeter at the Dunn Solar Telescope, oscillations with periods of the order of 5 min were detected at varying atmospheric heights by examining Si ɪ 10827 Å line bisector velocities. Spectropolarimetric inversions, coupled with the spatially resolved root mean square bisector velocities, allowed the wave energy fluxes to be estimated as a function of atmospheric height for each pore. We find propagating magnetoacoustic sausage mode waves with energy fluxes on the order of 30 kW m−2 at an atmospheric height of 100 km, dropping to approximately 2 kW m−2 at an atmospheric height of around 500 km. The cross-sectional structuring of the energy fluxes reveals the presence of both body- and surface-mode sausage waves. Examination of the energy flux decay with atmospheric height provides an estimate of the damping length, found to have an average value across all five pores of Ld ≈ 268 km, similar to the photospheric density scale height. We find the damping lengths are longer for body mode waves, suggesting that surface mode sausage oscillations are able to more readily dissipate their embedded wave energies. This work verifies the suitability of solar pores to act as efficient conduits when guiding magnetoacoustic wave energy upwards into the outer solar atmosphere. This article is part of the Theo Murphy meeting issue ‘High-resolution wave dynamics in the lower solar atmosphere’.

中文翻译：

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太阳孔隙大气中的磁声波能量耗散

太阳孔隙作为磁波导的适用性一直是近年来讨论的关键话题。在这里，我们提供了在一组五个光球太阳孔中传播磁流体动力波活动的观测证据。利用 Dunn 太阳望远镜的设施红外光谱偏振计获得的数据，通过检查 Si ɪ 10827 Å 线平分线速度，在不同的大气高度检测到周期为 5 分钟的振荡。光谱极化反演，再加上空间分辨的均方根平分线速度，允许将波能通量估计为每个孔隙的大气高度的函数。我们发现在 100 km 的大气高度处传播的磁声香肠模式波具有大约 30 kW m-2 的能量通量，在大约 500 km 的大气高度下降到大约 2 kW m-2。能量通量的横截面结构揭示了体模和表面模香肠波的存在。对能量通量随大气高度衰减的检查提供了对阻尼长度的估计，发现在 Ld ≈ 268 km 的所有五个孔隙中具有平均值，类似于光球密度尺度高度。我们发现体模波的阻尼长度更长，这表明表面模式香肠振荡能够更容易地消散其嵌入的波能。这项工作验证了在将磁声波能量向上引导到太阳外层大气中时，太阳孔隙是否适合作为有效的管道。