CAOSP abstracts, Volume: 43, No.: 2, year: 2013

Abstract: The white-light eclipse solar corona shows a plethora of structures of varying size and shape. A prominent type of them, very bright and far elongated of the solar limb, are the so-called helmet streamers, which connect regions of opposite magnetic polarity. We tried to derive their angular width from a series of eclipse observations. Our analysis shows that this width is, on average, around 32 degrees and seems not to depend on the cycle amplitude, its phase and/or its global magnetic activity. The traces of bright arcades, as located and observed at the bases of helmet streamers, were found to extend up to 0.70R.

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Last update: October 23, 2013