BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//AIP Calendar//www.aip.de//
BEGIN:VEVENT
SUMMARY:Special Seminar | Dr. Tibor Török (Predictive Science\, San Dieg
 o\, USA)
DTSTART:20260114T133000Z
DTEND:20260114T143000Z
DTSTAMP:20261023T125403Z
UID:www.aip.de-2386
CATEGORIES:Wissenschaftliches
CATEGORIES:Wissenschaftlicher Vortrag
CATEGORIES:öffentlich
CATEGORIES:Special Seminar
CATEGORIES:Sonne\, Sterne\, Exoplaneten
CONTACT:Julián Alvarado-Gómez <julian.alvarado-gomez@aip.de>
DESCRIPTION:Speaker: Dr. Tibor Török (Predictive Science\, San Diego\, U
 SA)\nTitle: Solar Eruptions Triggered by Flux Emergence\nAbstract: Observa
 tions have shown a clear association of filament/prominence eruptions with
  the emergence of magnetic flux in or near filament channels. Magnetohydro
 dynamic (MHD) simulations have been employed to systematically study the c
 onditions under which such eruptions occur. To date\, these simulations ha
 ve modeled filament channels as two-dimensional (2D) flux ropes or 3D unif
 ormly sheared arcades. Here we present MHD simulations of flux emergence i
 nto a more realistic configuration consisting of a bipolar active region c
 ontaining a line-tied 3D flux rope. We use the coronal flux-rope model of 
 Titov et al. (2014) as the initial condition and drive our simulations by 
 imposing boundary conditions extracted from a flux-emergence simulation by
  Leake et al. (2013). We identify three mechanisms that determine the evol
 ution of the system: (i) reconnection displacing foot points of field line
 s overlying the coronal flux rope\, (ii) changes of the ambient field due 
 to the intrusion of new flux at the boundary\, and (iii) interaction of th
 e (axial) electric currents in the pre-existing and newly emerging flux sy
 stems. The relative contributions and effects of these mechanisms depend o
 n the properties of the pre-existing and emerging flux systems. Here we fo
 cus on the location and orientation of the emerging flux relative to the c
 oronal flux rope. Varying these parameters\, we investigate under which co
 nditions an eruption of the latter is triggered.\nNote: Tibor Török can 
 be met after the seminar in the AIP and otherwise during Jan 12--15 at UP 
 in Golm\n
LOCATION:AIP\; Kirch-Haus\, Konferenzraum
END:VEVENT
END:VCALENDAR