arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0705.0604astro-ph
收藏

太阳黑子半影内移磁增强的发现

Discovery of inward moving magnetic enhancements in sunspot penumbrae

Jun Zhang, S. Solanki, J. Woch

摘要:

太阳黑子半影在连续强度上显示出精细的结构,显示出相当大的动力学。相比之下,磁场虽然也是高度结构化的,但似乎相对静止。本文报道了在SOHO/MDI磁图时间序列的基础上,在两个规则黑子的半影区发现向内移动的磁增强。在半影区域的内部的磁场的LOS分量的局部增强向内移动到本影-半影边界,径向速度约为0.3 km s $^{-1}$。磁场的LOS分量的这些局部向内移动增强似乎是相对常见的。它们与暗结构有关,相对于半影背景,倾向于显示下行流。可能的解释进行了讨论。

英文摘要:

Sunspot penumbrae show a fine structure in continuum intensity that displays considerable dynamics. The magnetic field, in contrast, although also highly structured, has appeared to be relatively static. Here we report the discovery of inward moving magnetic enhancements in the penumbrae of two regular sunspots based on time series of SOHO/MDI magnetograms. Local enhancements of the LOS component of the magnetic field in the inner part of the penumbral region move inward to the umbra-penumbra boundary with a radial speed of about 0.3 km s$^{-1}$. These local inward-moving enhancements of the LOS component of the magnetic fields appear to be relatively common. They are associated with dark structures and tend to display downflows relatively to the penumbral background. Possible explanations are discussed.

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。

↑