Full-disk magnetic oscillations in the solar photosphere

¹ INAF, Osservatorio Astronomico di Capodimonte, via Moiarello 16, 80131 Napoli, Italy
² Department of Physics University of Rome, P.le A. Moro 2, 00185 Rome, Italy
³ Institute of Geophysics, Astrophysics and Meteorology of the University of Graz, Universitaetsplatz 5, 8010 Graz, Austria
⁴ INAF, Osservatorio Astronomico di Trieste, via G. B. Tiepolo 11, 34131 Trieste, Italy
⁵ Kanzelhhe Solar Observatory, 9521 Treffen, Austria

Corresponding author: P. F. Moretti, moretti@na.astro.it

Received: 4 October 2002
Accepted: 27 February 2003

Abstract

Photospheric observations of the magnetic oscillations have been carried out to research magneto-acoustic waves in spots. The coupling between the magnetic field and the p-modes has been studied using reduced areas on the solar disk, but a global scenario is still missing. Four hour full-disk ma gne to grams (at 4 arcsec/pix spatial resolution) obtained in the sodium D-lines were analysed pixel-by-pixel (locally) and using the spherical harmonics decomposition (globally). Magnetic oscillations were detected at dif fe rent frequencies and identified on the solar disk. The global properties of the magnetic oscillations, shown via the diagrams, are for the first time presented and discussed.