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<div class="moz-cite-prefix">On 2018-10-01 09:21, Alexis Brandeker
wrote:<br>
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<div class="PlainText">Speaker: Stephanie Yardley (University
of St. Andrews)<br>
<br>
When/where: Friday October 5 at 10:30 in FC61 (Astronomy
corridor, 6th <br>
floor)<br>
<br>
Title:Simulating the coronal evolution and eruption of
bipolar active <br>
regions<br>
<br>
Abstract:<br>
To gain a better understanding of the formation and
evolution of the <br>
pre-eruptive structure of CMEs requires the direct
measurement of the <br>
coronal magnetic field, which is currently very difficult.
An <br>
alternative approach, such as the simulation of the
photospheric <br>
magnetic field must be used to infer the pre-eruptive
magnetic structure <br>
and coronal evolution prior to eruption. The evolution of
the coronal <br>
magnetic field of a small sub-set of bipolar active regions
is simulated <br>
by applying the magnetofrictonal relaxation technique of
Mackay et al. <br>
(2011). A sequence of photospheric line-of-sight
magnetograms produced <br>
by SDO/HMI are used to drive the simulation and continuously
evolve the <br>
coronal magnetic field of the active regions through a
series of <br>
non-linear force-free equilibria. The simulation is started
during the <br>
first stages of active region emergence so that the full
evolution from <br>
emergence to decay can be simulated. A comparison of the
simulation <br>
results with SDO/AIA observations show that many aspects of
the observed <br>
coronal evolution of the active regions can be reproduced,
including the <br>
majority of eruptions associated with the regions.<br>
<br>
Stephanie will be around on Wednesday and Thursday as well.
Contact her <br>
host Tine Libbrecht <a class="moz-txt-link-rfc2396E" href="mailto:tine.libbrecht@astro.su.se"><tine.libbrecht@astro.su.se></a> if
you want to schedule <br>
a meeting.<br>
<br>
All welcome!<br>
<br>
<br>
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