Running waves in the sunspot chromosphere

Details Running waves in the sunspot chromosphere Running waves in the sunspot chromosphere

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ge%26ae..49..935k&link_type=abstract

Geomagnetism and Aeronomy, Volume 49, Issue 7, pp.935-939

Physics

Scientific paper

Running waves at the chromospheric level (Hα) in sunspots are studied. Propagating 3-min oscillations are shown to be typical of many spots. Presumably, they propagate along the vertical magnetic-field lines. Their propagation speed is measured. According to our analysis, the 5-min oscillations propagating in the penumbral chromosphere are not a continuation of the 3-min umbral oscillations. The wavelength and propagation speed of the running penumbral waves are determined.

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