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BEGIN:VEVENT
DTSTAMP:20260428T040226Z
DTSTART;VALUE=DATE-TIME:20161205T150000
DTEND;VALUE=DATE-TIME:20161205T160000
SUMMARY:Andrew Hillier (Exeter): 'Observations of MHD Turbulence in Solar
  Prominences'
TZID:Europe/London
UID:20161205-094d434556b1f4b50156bc33596e38ea@warwick.ac.uk
CREATED:20160824T105817Z
DESCRIPTION:Turbulence is believed to be a key dynamical process in in ma
 ny astrophysical systems\, playing a key role in many different aspects 
 of solar activity from the dynamo to magnetic reconnection. The motions 
 of plasma in quiescent prominences\, as revealed by Hinode observations\
 , display highly complex flows across a wide range of spatial and tempor
 al scales\, and with the small diffusivity and viscosity of the system\,
  it is no surprise that prominences host turbulence. In this talk I will
  present my analysis of Hinode SOT dopplergrams of a quiescent prominenc
 e observed on the 2008-09-27. By investigating the spatial and temporal 
 correlations between the line-of-sight velocity fluctuations\, it was po
 ssible to determine the scaling of the power laws up to high-order in th
 e velocity difference\, which display powers that are at some scales con
 sistent with weak MHD turbulence\, and at others is consistent with stro
 ng MHD turbulence. I will present some interpretation of these results b
 ased on the current theoretical understanding of turbulence\, but also h
 ighlight areas in which they do not match with theory\, and hopefully pr
 ovide satisfactory explanations as to why this is the case. These result
 s present another piece of the puzzle that is understanding the complex 
 nature of quiescent prominences\, and also on the role how turbulence pl
 ays in the complex magnetic field found in the solar atmosphere.
LOCATION:PS128
CATEGORIES:CFSA Seminar
LAST-MODIFIED:20161114T100308Z
ORGANIZER;CN=Anne-Marie Broomhall:
END:VEVENT
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