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SUMMARY:Do ions and neutral atoms behave differently in solar prominences?
DTSTART;VALUE=DATE-TIME:20230510T104000Z
DTEND;VALUE=DATE-TIME:20230510T105500Z
DTSTAMP;VALUE=DATE-TIME:20240704T115654Z
UID:indico-contribution-331@meetings.aip.de
DESCRIPTION:Speakers: Horst Balthasar (Leibniz-Institute for Astrophysics 
 Potsdam)\nSolar prominences consist of a thin thus low-collisional and par
 tially ionized plasma.\n       Therefore\, the coupling of ions and neutra
 l atoms is much weaker than in photosphere\, \n       and ions are affecte
 d by the Lorentz-force\, while neutral atoms are not.\n       To investiga
 te this issue\, we performed simultaneous observations of the spectral lin
 es \n       of several ions and neutral atoms with THEMIS at the Observato
 rio del Teide\, Tenerife.\n       The selected spectral lines are opticall
 y thin\, so that we probe also the inner part  \n       of the prominence.
  We find that lines of ions are broadened compared to such from \n       n
 eutral atoms\, and Sr II 4216 is even broader than Fe II lines. Lines from
  neutral \n       metals (Mg I b2\, Na I D1) appear broader than He I 5016
 \, a line from the singlet \n       system. Doppler velocities also differ
  among the observed lines and show a typical \n       sequence. Probably t
 he situation is more complicated than just having one ionized \n       and
  one neutral plasma component.\n\nhttps://meetings.aip.de/event/24/contrib
 utions/331/
LOCATION:Haus H\, Telegrafenberg
URL:https://meetings.aip.de/event/24/contributions/331/
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