BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ZContent.net//ZapCalLib 1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20160329T123000
DTEND;TZID=Atlantic/Canary:20160329T133000
UID:iactalks-914
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/914
CREATED:2016-03-29T12:30:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Where are the solar magnetic poles?
DESCRIPTION:Where are the solar magnetic poles?\nMr. Adur Pastor Yabar\n\nI
 n mid nineteens, it was discovered that the Sun had a dipolar global  magn
 etic field, whose temporal evolution followed the Solar Cycle. Polar  regi
 ons, as well as sunspots that appear in the activity belts, changed  their
  polarity every 11 years: sunspots during each activity minima,  and the p
 oles in activity maxima. This fact, made people think that the  poles reve
 rsal was related to the arrival of opposite polarity magnetic  flux dragge
 d from active regions by a meridional flow. Such new flux  reduced the dom
 inant polarity at the poles by cancellation, and built  the opposite one u
 ntil next minimum of activity. In our study, we have used the high quality
  full disc magnetograms,  recorded by the HMI instrument onboard the SDO s
 atellite since the  beginning of the mission, in april 2010. We perform a 
 deep study of the  evolution with time of the line of sight component of t
 he magnetic field  at the solar poles. In our data, we see many aspects of
  the solar cycle  as the decay of the dominant polarity of both poles whil
 e we approach  to the activity maximum. But the main result is the detecti
 on of a  monthly oscillatory pattern of the pole's magnetic field. Such  o
 scillation, related to solar rotation is a clear evidence of a  non-axisym
 metric component of the magnetic field. One of the possible  explanations 
 is that the global field is tilted with respect to the  rotation axis. Thi
 s rather usual finding in other stars, here represents  a breach of modern
  solar dynamo theories for the generation and  maintenance of the Sun's ma
 gnetic field.
END:VEVENT
END:VCALENDAR