[Astronomy seminar] Astronomy seminar TODAY at 10:30 in FC61

[Astronomy seminar announcements]

On 2018-10-01 09:21, Alexis Brandeker wrote:
> Speaker: Stephanie Yardley (University of St. Andrews)
>
> When/where: Friday October 5 at 10:30 in FC61 (Astronomy corridor, 6th
> floor)
>
> Title:Simulating the coronal evolution and eruption of bipolar active
> regions
>
> Abstract:
> To gain a better understanding of the formation and evolution of the
> pre-eruptive structure of CMEs requires the direct measurement of the
> coronal magnetic field, which is currently very difficult. An
> alternative approach, such as the simulation of the photospheric
> magnetic field must be used to infer the pre-eruptive magnetic structure
> and coronal evolution prior to eruption. The evolution of the coronal
> magnetic field of a small sub-set of bipolar active regions is simulated
> by applying the magnetofrictonal relaxation technique of Mackay et al.
> (2011). A sequence of photospheric line-of-sight magnetograms produced
> by SDO/HMI are used to drive the simulation and continuously evolve the
> coronal magnetic field of the active regions through a series of
> non-linear force-free equilibria. The simulation is started during the
> first stages of active region emergence so that the full evolution from
> emergence to decay can be simulated. A comparison of the simulation
> results with SDO/AIA observations show that many aspects of the observed
> coronal evolution of the active regions can be reproduced, including the
> majority of eruptions associated with the regions.
>
> Stephanie will be around on Wednesday and Thursday as well. Contact her
> host Tine Libbrecht <tine.libbrecht at astro.su.se> if you want to schedule
> a meeting.
>
> All welcome!
>
>

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