Dynamic phenomena in the chromospheric layer of a sunspot

We have studied running penumbral waves, umbral oscillations, umbral flashes and their interrelations from H alpha observations of a large isolated sunspot. Using a subtraction image processing technique we removed the sharp intensity gradient between the umbra and the penumbra and enhanced the low...

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Veröffentlicht in:	Solar physics 1992-03, Vol.138 (1), p.93-105
Hauptverfasser:	ALISSANDRAKIS, C. E, GEORGAKILAS, A. A, DIALETIS, D
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Earth, ocean, space Exact sciences and technology Solar physics Solar system Sunspots, faculae, plages
Online-Zugang:	Volltext
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