HVAR 2004

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collaboration of Klaus Wilhelm Li
Feng Werner Curdt Suguru Kamio
Multi-spacecraft observations of polar coronal
plumes Werner Curdt, Max-Planck-Institut für
Sonnensystemforschung
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SoHO SUMER HINODE EIS CDS XRT MDI
SOT UVCS EIT STEREO EUVI A B
TRACE Kitt Peak SOLIS
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EIS and SUMER performance parameters spatial
1 arcsec spectral 2 km/s temporal
several seconds
EIS A 17 nm lt ? lt 21 nm EIS B 25 nm lt ? lt 29
nm SUMER 66 nm lt ? lt 161 nm
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DeForest et al. 1997, Sol. Phys. 175, 393 Wilhelm
et al. 1998, ApJ 500, 1023 Teriaca et al. 2003,
ApJ 588, 566 Gabriel et al. 2003, ApJ 589,
623 Antonucci et al. 2004, AA 416, 749
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West
4
3
view direction B
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view direction A
1
0
East
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4
0
1
2
3
O VI 1032, 1038 Ne VIII 770 Si VIII 1440,
1445 Mg IX 706, 750 Mg VIII 772 Ly-ß 1025
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145/140 ratio
Doschek 1997
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Summary ? 3D plume geometry could be derived
from STEREO/EUVI images. ? Plumes could be linked
to CH bright points. ? Spectral images of the
plumes in a wide temperature range. ? Ne
enhancement in plumes derived from plasma
diagnostic. ? Abundance anomaly in plumes due to
FIP effect. Outlook ? A second data set, not
yet analysed. ? An ISSI international study team
has focussed on this project. ? Plans for further
observations with a better stereoscopic view in
Oct.