o bservations of the failed eruption of the magnetic flux rope – a direct application of
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O bservations of the failed eruption of the magnetic flux rope – a direct application of the quadrup olar model for a solar flare Tomasz Mrozek Astronomical Institute University of Wrocław. 50 th anniversary. 50 th anniversary. 50 years ago Sweet suggested that flares - PowerPoint PPT PresentationTRANSCRIPT
OObservations of the failed eruption bservations of the failed eruption of the magnetic flux rope – of the magnetic flux rope –
a direct application of a direct application of the quadrupthe quadrupolarolar model for a solar flare model for a solar flare
Tomasz MrozekTomasz MrozekAstronomical InstituteAstronomical InstituteUniversity of WrocławUniversity of Wrocław
OObservations of the failed eruption bservations of the failed eruption of the magnetic flux rope – of the magnetic flux rope –
a direct application of a direct application of the quadrupthe quadrupolarolar model for a solar flare model for a solar flare
Tomasz MrozekTomasz MrozekAstronomical InstituteAstronomical InstituteUniversity of WrocławUniversity of Wrocław
50th anniversary
50th anniversary
Sweet, P. A. 1958
50 years ago Sweet suggested that flares may occur in the quadrupolar magnetic filed configuration.
The quadrupolar model describes observed features of solar flares in a more natural way.
For some reason much of the theoretical work has ignored this kind of complexity and try to develop the theory of simple, bipolar configuration – the „standard” model
The quadrupolar model
Uchida et al. 1999Hirose et al. 2001
A quotation from Hirose et al. (2001):
In this simulation (…) the upward motion of the dark filament (…) may eventuallybe arrested by the overlying closed field.
The flare
M6.2 GOES classN14 W61
RHESSI: entire event
TRACE: 171 Å (several seconds
cadence,entire event)
1600 Å (several second cadence,decay phase)
GOES SXI: several, saturated images
SOHO LASCO:no CME reported
The flare
M6.2 GOES classN14 W61
RHESSI: entire event
TRACE: 171 Å (several seconds
cadence,entire event)
1600 Å (several second cadence,decay phase)
GOES SXI: several, saturated images
SOHO LASCO:no CME reported
The flare
The image obtained 2 hours after the maximum of the flare.
The flare
Two systems of ribbons wereobserved:
inner – related to the flaringarcade
outer – related to the „post-flaresystem of loops”
The eruption
Abrupt brightening connected with the flare is visible inthe TRACE image obtained on 5:17:30 UT
The eruption of the magnetic flux tube is observed several seconds after
The eruption started in a very compact region (about 3000 km in diameter)
The eruption
Initial phase,the eruption moves with small, constantvelocity
1Fast evolutionfollowing the strongest HXR peak visible in 25-50 keVrange
2
Deceleration phase. Main front changes its shape. Side eruptions areobserved
3
25-50 keV
Brightenings observed during the deceleration of the main front.
The deceleration value (about 600 m/s2) and the shape of the eruption front show that „something”stopped it. It is possible that two systems of loops were involved in braking the eruption.
Interaction with low-lying loops
Brightenings in the region marked with the red box were observed exactly during the deceleration of the eruption.
Interaction with low-lying loops
inner ribbons
outer ribbons
The lack of observations made with the 1600 Å filter
Interaction with low-lying loops
Interaction with low-lying loops
Spatial relationship between decelerated front and tops of loops visible later
Brightenings observed during the braking of the eruption
HXR source (6-12 keV) spatially correlated with the decelerated front
Interaction with high-lying loops
Above the erupting structure we observed the system of high-lying loops.
These loops changed their height as the eruption evolved.
the end of the force driving the movement of the high-lying loops
Interaction with high-lying loops
Clear relationship between an evolutionof the eruption and a height of the high-lyingloops
Summary
The eruption started in a very compact region, not in the large system of loops.The small arcade was visible after.
Decelaration of the eruption The interaction between the eruptionand overlying system of loops
Brightenings outside the flaring structure during the interaction between the eruption and surrounding loops