The Influence of Magnetic Field on Oscillations in the Solar Chromosphere

D. Shaun Bloomfield, R. T. James McAteer, Michail Mathioudakis, Francis P. Keenan

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Two sequences of solar images obtained by the Transition Region and Coronal Explorer in three UV passbands are studied using wavelet and Fourier analysis and compared to the photospheric magnetic flux measured by the Michelson Doppler Interferometer on the Solar Heliospheric Observatory to study wave behavior in differing magnetic environments. Wavelet periods show deviations from the theoretical cutoff value and are interpreted in terms of inclined fields. The variation of wave speeds indicates that a transition from dominant fast-magnetoacoustic waves to slow modes is observed when moving from network into plages and umbrae. This implies preferential transmission of slow modes into the upper atmosphere, where they may lead to heating or be detected in coronal loops and plumes.
Original languageEnglish
Pages (from-to)812-819
JournalAstrophysical Journal
Volume652
DOIs
Publication statusPublished - 20 Nov 2006

ASJC Scopus subject areas

  • Space and Planetary Science

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