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Period measurement of the umbral oscillation with sunspot
Pages: 6-11
Year: Issue:  1
Journal: Journal of Yunan Normal University(Natural Sciences Edition)

Keyword:  太阳黑子本影振荡周期傅立叶变换;
Abstract: 本影振荡是出现在太阳黑子内的一种普遍现象,精确测定它的周期对理解太阳黑子演化有着重要意义.2007年4月30日太空太阳望远镜Solar-B利用谱线CaII H对太阳活动区AR10953进行了连续的观测.这份高质量的观测资料能够帮助我们精确地测量太阳黑子的震荡周期.利用快速傅立叶变换(FFT)方法,我们测出太阳黑子的震荡周期约为140秒.
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