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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20081028T000000
DTEND;TZID=Atlantic/Canary:20081028T010000
UID:iactalks-143
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/143
CREATED:2008-10-28T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Convectively driven vortex flows in the Sun
DESCRIPTION:Convectively driven vortex flows in the Sun\nDr. José Antonio 
 Bonet, Dr. Jorge Sánchez-Almeida\n\nWe have discovered small whirlpools i
 n the Sun, with a size similar to the terrestrial hurricanes (<0.5 Mm).
   The theory of solar convection predicts them, but they had remained elus
 ive so far. The vortex flows are created at the downdrafts where the plasm
 a returns to the solar interior after cooling down, and we detect them bec
 ause some magnetic bright points (BPs) follow a logarithmic spiral in thei
 r way to be engulfed by a downdraft.  Our disk center observations show 0.
 009 vortexes per Mm2, with a lifetime of the order of 5 min, and with no p
 referred sense of rotation. They are not evenly spread out over the surfac
 e, but they seem to trace the supergranulation and the mesogranulation. Th
 ese observed properties are strongly biased by our type of measurement, un
 able to detect vortexes except when they are engulfing magnetic BPs.
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