Problem of Alfvén waves in solar photosphere

J. Vranjes, S. Poedts, B. P. Pandey

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution


The convective motion in the weakly ionized solar photosphere, where only a tiny fraction of the gas is ionized, covers the complete solar surface. The purpose of this work is to check if this motion can be a source for the excitation of electromagnetic Alfvén-type waves. Using the standard plasma theory, the magnetization and collision frequencies of the plasma components are examined. Based on these results, an analysis of small electromagnetic perturbations in the photospheric plasma is performed. It is shown that the convective neutral motion in the lower photosphere can efficiently carry the plasma species along. However, the ions in this region appear to be completely un-magnetized and thus they can not support Alfvén-type electromagnetic perturbations. The collisions remain so frequent that the Alfévn waves are strongly damped.
Original languageEnglish
Title of host publicationXXVIII International Conference on Ionized Gases
Subtitle of host publicationJuly 15-20, 2007, Prague, Czech Republic : proceedings
EditorsJ. Schmidt
Place of PublicationPrague
PublisherInstitute of Plasma Physics AS CR
Number of pages4
ISBN (Print)9788087026014
Publication statusPublished - 2007
EventInternational Conference on Phenomena in Ionized Gases (28th : 2007) - Prague, Czech Republic
Duration: 15 Jul 200720 Jul 2007


ConferenceInternational Conference on Phenomena in Ionized Gases (28th : 2007)
CityPrague, Czech Republic

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