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SUMMARY:Dynamics of the atmosphere of Red SuperGiants: a view from spectro
 polarimetry and solar physics
DTSTART:20260318T123000Z
DTEND:20260318T133000Z
DTSTAMP:20260421T034500Z
UID:indico-event-9507@indico.fysik.su.se
DESCRIPTION:Speakers: Arturo López Ariste (CNRS+UPS/IRAP)\n\nUnexpectedly
 \, linear polarization was found in the spectra of Betelgeuse a few years 
 ago\, and then in many other red supergiants. The interpretation of those 
 signals in terms of brightness distributions led to images of the photosph
 ere of these stars and from this to a change in the manner they were studi
 ed: from global\, point-like objects to resolved and detailed stars which\
 , like the Sun\, are examined feature by feature. Convective structures an
 d big plumes of overshooting plasma appeared\, and measurements of velocit
 ies of the nascent wind were done. I will tour all these results and discu
 ss the Great Dimming event that cloaked Betelgeuse in dust for a few month
 s at the end of 2019.\n\nhttps://indico.fysik.su.se/event/9507/
LOCATION:FC61 (AlbaNova Main Building)
URL:https://indico.fysik.su.se/event/9507/
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