Chromospheric evolution and the flare activity of super-active region NOAA 6555

被引：0

作者：

Debi Prasad C. ^{[1
]}

Ambastha A. ^{[1
]}

Srivastava N. ^{[1
]}

Tripathy S.C. ^{[1
]}

Hagyard M.J. ^{[2
]}

机构：

[1] Udaipur Solar Observatory

[2] ES52, Space Science Laboratory, NASA/Marshall Space Flight Center, Huntsville

来源：

Journal of Astrophysics and Astronomy | 1997年 / 18卷 / 1期

关键词：

Chromosphere; Flare activity; Magnetic field; Super-active region;

D O I：

10.1007/BF02714853

中图分类号：

学科分类号：

摘要：

Super-active region NOAA 6555 was highly flare productive during the period March 21st - 27th, 1991 of its disk passage. We have studied its chromospheric activity using high spatial resolution Hα filtergrams taken at Udaipur along with MSFC vector magnetograms. A possible relationship of flare productivity and the variation in shear has been explored. Flares were generally seen in those subareas of the active region which possessed closed magnetic field configuration, whereas only minor flares and/or surges occurred in subareas showing open magnetic field configuration. Physical mechanisms responsible for the observed surges are also discussed.

引用

页码：39 / 55

页数：16

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