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BEGIN:VEVENT
DTSTAMP:20260521T131746Z
UID:https://www.mps.mpg.de/events/45593/4914862
DTSTART:20260507T090000Z
DTEND:20260507T100000Z
CLASS:PUBLIC
CREATED:20260503T193421Z
DESCRIPTION: Magnetohydrodynamic waves are often regarded as efficient path
 ways for magnetic energy transfer from the solar interior. Consequently\, 
 they are key to not only understand the physical processes behind coronal 
 heating and/or solar wind acceleration but also serve as useful diagnostic
  tools. While Alfvén wave modes are notoriously difficult to detect direc
 tly by remote sensing – due to their incompressive nature – magnetoaco
 ustic wave modes can perturb the density and temperature as they propagate
 . More recently\, observations from the Metis coronagraph on board the Sol
 ar Orbiter have shown the ubiquitous presence of propagating density fluct
 uations in a helmet streamer as well as in a pseudo-streamer with a 5-minu
 te period. Using 2.5D MHD simulations\, we find that such density fluctuat
 ions can be generated either from (non-linear) Alfvén waves or directly f
 rom magnetoacoustic waves. Furthermore\, density fluctuations generated fr
 om Alfvén waves have a doubled frequency with respect to the (driven) Alf
 vén wave frequency because of non-linear ponderomotive forces. This featu
 re might be a useful diagnostic for the (in-situ) distinction between dens
 ity fluctuations generated from these different mechanisms.\nVortragende(r
 ): Anmol Kumar 
LAST-MODIFIED:20260503T194031Z
LOCATION:https://uio.zoom.us/j/63138938090
ORGANIZER;CN=Valeriia Liakh:mailto:
SUMMARY:ESPOS: ESPOS: Modelling Magnetohydrodynamic Waves in Streamers: Fir
 st Comparison with Metis Observations (Anmol Kuma)
URL;VALUE=URI:https://www.mps.mpg.de/events/45593/4914862
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