All Figures

$\begin{figure} \par\includegraphics[width=8.15cm,clip]{1519f01.ps}\end{figure}$ Figure 1: Magnitude of the initial potential magnetic field versus altitude at the center of the domain at (x;y) = (0;0).
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In the text

$\begin{figure} \par\includegraphics[width=6.75cm,clip]{1519f02a.ps}\hspace*{5mm} \includegraphics[width=6.75cm,clip]{1519f02b.ps}\end{figure}$ Figure 2: Top and projection views of the initial potential magnetic field within the whole domain. The grey scale at the z=0 plane is white/black for $b_z=\pm 480$ G. [Pink; red; green; dark-blue; light-blue; black] field lines are rooted in $b_z=\pm~ [475; 400; 300; 250; 150; 50]$ G.
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In the text

$\begin{figure} \par\mbox{\hspace*{2mm}\psfig{figure=1519f03a.ps,width=5.2cm}\hsp... ...90}\hspace*{0.5cm} \psfig{figure=1519f03f.ps,width=5cm,angle=-90} } \end{figure}$ Figure 3: ( First row): Profiles of b_z and u_y along the (x; y=0,z=0) axis. ( Second row): Contours of $b_z=\pm 50$ ; 100; 150; 200; 250; 300; 350; 400; 450 G and velocity vectors at z=0. The [first;second;third] columns correspond to vortices defined by $\zeta = [10;0.9;0.5]$ .
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In the text

$\begin{figure} \par\mbox{\psfig{figure=1519f04a.ps,width=8cm,angle=-90}\hspace*{... ...-90}\hspace*{0.cm} \psfig{figure=1519f04d.ps,width=8cm,angle=-90} } \end{figure}$ Figure 4: Continuously twisted runs. All quantities are plotted as a function of the central twist $\mathcal{N}$ . Each mark is separated in time by $\Delta t = 30$ s. [ stars; pluses; crosses] correspond to $\zeta = [10;0.9;0.5]$ . ( First row): Global magnetic and kinetic energies. ( Second row): Altitude and vertical velocity of the axial field line rooted in the vortex centers.
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In the text

$\begin{figure} \par\mbox{\psfig{figure=1519f05a.ps,width=7.cm,bbllx=50pt,bblly=1... ...th=7.cm,bbllx=83pt,bblly=175pt,bburx=532pt,bbury=625pt,clip=} } \par\end{figure}$ Figure 5: Magnetic configurations for $\zeta = [10;0.9;0.5]$ shown on the [first; second; third] row. All figures are plotted for a central twist $\mathcal{N} \sim 1.25$ turns. The color coding is the same as in Fig. 2.
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In the text

$\begin{figure} \par\mbox{\psfig{figure=1519f06a.ps,width=8.5cm,angle=-90}\hspace*{0.cm} \psfig{figure=1519f06b.ps,width=8.5cm,angle=-90} } \end{figure}$ Figure 6: Five examples of relaxation runs. Pluses correspond to ( $\mathcal{N}=1.05 ; \zeta=10$ ), stars to ( $\mathcal{N}=0.92 ; \zeta=10$ ), diamonds to ( $\mathcal{N}=1.48 ; \zeta=0.9$ ), triangles to ( $\mathcal{N}=1.41 ; \zeta=0.9$ ) and crosses to ( $\mathcal{N}=1.66 ; \zeta=0.5$ ). Each mark is separated in time by $\Delta t = 30$ s. ( Left): Magnetic energy as a function of time. ( Right): Altitude-velocity diagrams showing the begining of damped oscillations along z.
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In the text

$\begin{figure} \par\mbox{\psfig{figure=1519f07a.ps,width=8.5cm,angle=-90}\hspace*{0.cm} \psfig{figure=1519f07b.ps,width=8.5cm,angle=-90} } \par\end{figure}$ Figure 7: Equilibrium curves derived from relaxation runs. ( Left): Same as Fig. 4, bottom left, overlaid with [ triangles; diamonds; squares] which correspond to "equilibrium'' positions found from relaxation runs with $\zeta = [10;0.9;0.5]$ . The corresponding equilibrium curves are overplotted as dashed lines. ( Right): Same equilibrium curves and calculated "equilibrium'' positions plotted with log/square axes. The dashed horizontal line represents the height of the top boundary.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8cm,clip]{1519f08a.ps}\vspac... ...*{4mm} \par\includegraphics[angle=-90,width=8.3cm,clip]{1519f08c.ps}\end{figure}$ Figure 8: Simulated height-velocity-time plots of the axial field line of continuously driven flux tubes twisted with $u_{\mbox{\rm {\tiny {phot}}}}=1$ km s^-1, for altitudes between the photosphere ( $z=1~R_\odot$ ) and the top of helmet streamers ( $z=2{-}3~R_\odot$ ). [ thick; thin] lines correspond to $h_{\circ }= [11.5 ; 69]$ Mm and to $R_{\mbox{\rm {\tiny {phot}}}}~ [1.5 ; 9]$ Mm. [ dash-dotted; continuous; dashed] lines correspond to $\zeta = [10;0.9;0.5]$ .
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In the text

$\begin{figure} \par\mbox{\psfig{figure=1519f09a.ps,width=5.5cm,angle=-90}\hspace... ...width=5.7cm,bbllx=50pt,bblly=149pt,bburx=532pt,bbury=625pt,clip=} } \end{figure}$ Figure 9: ( First row): Contours of $b_z=\pm 50;100;150;200;250;300;350;400;450$ G and transverse field vectors at z=0. ( Second row): Greyscale images of $\jmath _z$ at z=0. White/black correspond to $\jmath _z=9$ mA m^-2. The [first; second; third] columns correspond to vortices defined by $\zeta = [10;0.9;0.5]$ . All figures are plotted for a central twist $\mathcal{N} \sim 1.25$ turns.
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In the text

$\begin{figure} \par\mbox{\psfig{figure=1519f10a.ps,width=5.8cm}\hspace*{0.05cm} ... ...h=5.7cm,bbllx=50pt,bblly=150pt,bburx=532pt,bbury=625pt,clip=} } \par\end{figure}$ Figure 10: ( First row): X-ray sigmoïds calculated from the vertical integration of the Joule heating term. The minimal (black) and maximal (white) intensities are scaled to the same values for all three cases. ( Second row): Sigmoïd with field lines overplotted. [Pink; green; red; blue] lines are rooted respectively around [the vortex centers; the sigmoïd ends; their brightest parts; their edges]. ( Third row): Projection view of the same field lines with greyscale for b_z at z=0. The [first; second; third] columns correspond to vortices defined by $\zeta = [10;0.9;0.5]$ . All figures are plotted for a central twist $\mathcal{N} \sim 1.25$ turns.
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In the text

$\begin{figure} \par\includegraphics[width=8.15cm,clip]{1519f01.ps}\end{figure}$	Figure 1: Magnitude of the initial potential magnetic field versus altitude at the center of the domain at (x;y) = (0;0).
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$\begin{figure} \par\includegraphics[width=6.75cm,clip]{1519f02a.ps}\hspace*{5mm} \includegraphics[width=6.75cm,clip]{1519f02b.ps}\end{figure}$	Figure 2: Top and projection views of the initial potential magnetic field within the whole domain. The grey scale at the z=0 plane is white/black for $b_z=\pm 480$ G. [Pink; red; green; dark-blue; light-blue; black] field lines are rooted in $b_z=\pm~ [475; 400; 300; 250; 150; 50]$ G.
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$\begin{figure} \par\mbox{\hspace{2mm}\psfig{figure=1519f03a.ps,width=5.2cm}\hsp... ...90}\hspace{0.5cm} \psfig{figure=1519f03f.ps,width=5cm,angle=-90} } \end{figure}$	Figure 3: ( First row): Profiles of b_z and u_y along the (x; y=0,z=0) axis. ( Second row): Contours of $b_z=\pm 50$ ; 100; 150; 200; 250; 300; 350; 400; 450 G and velocity vectors at z=0. The [first;second;third] columns correspond to vortices defined by $\zeta = [10;0.9;0.5]$ .
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$\begin{figure} \par\mbox{\psfig{figure=1519f04a.ps,width=8cm,angle=-90}\hspace{... ...-90}\hspace{0.cm} \psfig{figure=1519f04d.ps,width=8cm,angle=-90} } \end{figure}$	Figure 4: Continuously twisted runs. All quantities are plotted as a function of the central twist $\mathcal{N}$ . Each mark is separated in time by $\Delta t = 30$ s. [ stars; pluses; crosses] correspond to $\zeta = [10;0.9;0.5]$ . ( First row): Global magnetic and kinetic energies. ( Second row): Altitude and vertical velocity of the axial field line rooted in the vortex centers.
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$\begin{figure} \par\mbox{\psfig{figure=1519f05a.ps,width=7.cm,bbllx=50pt,bblly=1... ...th=7.cm,bbllx=83pt,bblly=175pt,bburx=532pt,bbury=625pt,clip=} } \par\end{figure}$	Figure 5: Magnetic configurations for $\zeta = [10;0.9;0.5]$ shown on the [first; second; third] row. All figures are plotted for a central twist $\mathcal{N} \sim 1.25$ turns. The color coding is the same as in Fig. 2.
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