Upflow in the Plage Region Associated with an Xclass Flare Shinsuke Imada NAOJ

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Upflow in the Plage Region Associated with an
X-class FlareShinsuke Imada (NAOJ)

• CO-authors H. Hara, T. Watanabe, A. Asai, S.
  Kamio (NAOJ), K. Matsuzaki (JAXA), L.K. Harra
  (MSSL), J.T. Mariska (NRL), and EIS-Team

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Dec 13 2006 Flare
Magnetogram
Plage
Observe the effect of the X class flare in Plage
region with EIS Main thing in this talk is
doppler shift (upflow)
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EIT (FeXII 195A)
There is Semi-Coronal hole. EIT wave was observed
associate with Flare. Plage region get darker
associate with EIT wave and some recovery can be
observed.
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EIS Observation
horizontalscan verticalslit White lineslit
position
horizontalwavelength verticalslit
FeX
FeXI
CaXVII
FeXII
FeXIII
HeII
FeXIV
FeXV
FeVIII
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EIS Observation
FeX
FeXI
CaXVII
FeXII
FeXIII
HeII
FeXIV
FeXV
FeVIII
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Doppler Shift (Single Gauss Fit)
FeXIV
FeXV
FeXII
FeXIII
gt 1 hour
Quasi-Steady
FeX
HeII
4.5 hour
-150km/s
150km/s
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Color FeXV intensity
Contour doppler
Strong blueshift was observed at Foot point or
Dimming boundary region
Color doppler
Blue Shifts
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High Temperature Emission Lines
FeXV
FeXIII
FeXIV
Reference
Blueshift
0.154 (A)
0.120 (A)
0.080 (A)
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Middle Temperature Emission Lines
FeXII
FeX
FeXI
Reference
Blueshift
0.057 (A)
0.025 (A)
0.023 (A)
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Low Temperature Emission Lines
FeVIII
OV
HeII
Reference
Blueshift
0.015 (A)
0.011 (A)
0.014 (A)
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Velocity vs Temperature
Dashed lineSound Speed
FeXV
FeXIV
FeXIII
Upward Velocity km/sec
FeXII
FeX
FeXI
FeVIII
OV
HeII
Log Te
We estimate the upflow velocity from 105 to 2X106
K. The upflows are very sensitive to temperature!
In FeXV line, upflow velocity is almost sound
speed.
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Discussion (Topology Change)
Open Field Low Pressure
Open Field
Closed Loop High Pressure
Closed Loop
0312
0138
0500
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Fit T-V relation
FeXV
FeXIV
FeXIII
FeXII
Log Te
FeXI
FeX
Teav4bv3cv2dve
FeVIII
OV
HeII
Upward Velocity km/sec
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Derived from Steady Kinetic EQ and mass flux
conservation
Dowdy et al., 1987 Rabin et al., 1991 Chae et
al., 1998
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Solution
FeXV
FeXIV
FeXIII
Height
60Mm
FeXII
40Mm
FeXI
20Mm
FeX
FeVIII
OV
0Mm
HeII
vA
logT
Velocity
Log(n)
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Energy Equation
Unknown
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erg/cm3/s
S (cm)
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Summary

• EIS observed sound speed upflow in the Plage
  region associate with X class flare.
• Upflow is clearly depend on its temperature.
  (FeXV150km/sec, HeII 10km/sec)
• These observations are also important to
  understand solar wind acceleration. Strong
  heating occur 50Mm?