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arXiv 0709.3462astro-ph
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高频声波能加热安静的太阳色球层吗?

Can High Frequency Acoustic Waves Heat the Quiet Sun Chromosphere?

Mats Carlsson, Viggo H. Hansteen, Bart De Pontieu, Scott McIntosh, Theodore D. Tarbell, Dick Shine, Saku Tsuneta, Yukio Katsukawa, Kiyoshi Ichimoto, Yoshinori S… 展开作者

Mats Carlsson, Viggo H. Hansteen, Bart De Pontieu, Scott McIntosh, Theodore D. Tarbell, Dick Shine, Saku Tsuneta, Yukio Katsukawa, Kiyoshi Ichimoto, Yoshinori Suematsu, Toshifumi Shimizu, Shin'ichi Nagata

摘要:

我们使用Hinode/SOT Ca II H线和蓝色连续宽带观测研究高空间分辨率下高频声波的存在和功率。我们发现,在小的空间尺度上没有占主导地位的权力;使用全分辨率的Hinode(0.05“像素,0.16”分辨率)的综合权力是大于权力的数据退化到0.5“像素(跟踪像素大小),只有1.2的一个因素。在20 mHz时,比率为1.6。将这一结果与基于Fossum & Carlsson(2006)的TRACE数据的声通量估计相结合,我们得出结论,进入安静太阳网络间色球层的频率为5-40 mHz的声波的总能量通量小于800 W m $^{-2}$,不足以平衡静态色球层中辐射损失的五倍。

英文摘要:

We use Hinode/SOT Ca II H-line and blue continuum broadband observations to study the presence and power of high frequency acoustic waves at high spatial resolution. We find that there is no dominant power at small spatial scales; the integrated power using the full resolution of Hinode (0.05'' pixels, 0.16'' resolution) is larger than the power in the data degraded to 0.5'' pixels (TRACE pixel size) by only a factor of 1.2. At 20 mHz the ratio is 1.6. Combining this result with the estimates of the acoustic flux based on TRACE data of Fossum & Carlsson (2006), we conclude that the total energy flux in acoustic waves of frequency 5-40 mHz entering the internetwork chromosphere of the quiet Sun is less than 800 W m$^{-2}$, inadequate to balance the radiative losses in a static chromosphere by a factor of five.

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