Observations of sausage modes in magnetic pores

Richard Morton, Robert Erdélyi, David Jess, Mihalis Mathioudakis

Research output: Contribution to journalArticlepeer-review

79 Citations (Scopus)
14 Downloads (Pure)


We present here evidence for the observation of the magnetohydrodynamic (MHD) sausage modes in magnetic pores in the solar photosphere. Further evidence for the omnipresent nature of acoustic global modes is also found. The empirical decomposition method of wave analysis is used to identify the oscillations detected through a 4170 Å "blue continuum" filter observed with the Rapid Oscillations in the Solar Atmosphere (ROSA) instrument. Out of phase, periodic behavior in pore size and intensity is used as an indicator of the presence of magnetoacoustic sausage oscillations. Multiple signatures of the magnetoacoustic sausage mode are found in a number of pores. The periods range from as short as 30 s up to 450 s. A number of the magnetoacoustic sausage mode oscillations found have periods of 3 and 5 minutes, similar to the acoustic global modes of the solar interior. It is proposed that these global oscillations could be the driver of the sausage-type magnetoacoustic MHD wave modes in pores.
Original languageEnglish
Pages (from-to)L18
JournalThe Astrophysical Journal
Issue number2
Publication statusPublished - Mar 2011


Dive into the research topics of 'Observations of sausage modes in magnetic pores'. Together they form a unique fingerprint.

Cite this