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UN RÔLE POUR LE TÉLESCOPE THEMIS DANS LA
PRÉVISION DES ÉJECTIONS DE MATIÈRE
Véronique BOMMIER LERMA, Observatoire de
Meudon V.Bommier_at_obspm.fr 01 45 07 79 48
PNST, Observatoire de Paris 15 janvier 2008
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Éjection d'une protubérance 18 août 1980
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http//www.swpc.noaa.gov/
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http//www.swpc.noaa.gov/
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http//www.swpc.noaa.gov/
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la météo spatiale du soleil à la terre
la météo une carte un code
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Les cartes de champ magnétique vectoriel à la
surface du soleil THEMIS
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polarimetric analysis I,Q,U,V
inversion ?B,?,? 2 components atmosphere
Observations
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polarimetric analysis I,Q,U,V
Observations
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inversion ?B,?,? 2 components atmosphere
UNNOFIT Landolfi, M., Landi Degl'Innocenti, E.,
Arena, P., 1984, Solar Physics 93, 269
Unno-Rachkowsky analytical solution in a
Milne-Eddington atmosphere Marquardt algorithm
to reach the minimum ?2 (Harvey et al., 1972,
Auer et al., 1977) ? Magneto-optical and
damping effects (Landolfi Landi Degl'Innocenti,
1982)
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Vector Magnetic Field maps THEMIS
observations UNNOFIT inversion
13 September 2005, Delta-Spot, NOAA 10808,
courtesy V.Bommier
first map 7 December 2003, published (Bommier
et al., 2007, AA 464, 323, also UNNOFIT
reference) 191 vector maps now visible on the
web 155 in the BASS2000 data basis
(2004-2007) (15 are bursts on an AR, 108 are
multiline 6302/5250, PCA inversion in the 6301
line) 36 in the V. Bommier personal page
(2005-2006) (28 in common with BASS2000, but
including band assembling for large maps (up to
6x4 arcmin) and anamorphosis correction, 2
are multiline 6301/6302/5250, 1 is multiline
6301/6302/5250/6103) all obtained in
THEMIS/MTR-basic mode in addition, 53 inverted
maps are not yet on the web (2005-2008) (V.
Bommier, P. Mein, S. Gosain, G. Yang, ...)
inversion of THEMIS/MTR-basic, THEMIS/MTR-grid
and THEMIS/MSDP maps targets sunspots
active regions filaments and filament
channels quiet sun our last campaign in
November 2007 (10 days, 30 maps at BASS2000)
unfortunately lacks of solar activity
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UNNOFIT Landolfi, M., Landi Degl'Innocenti, E.,
Arena, P., 1984, Solar Physics 93, 269

• Unno-Rachkowsky analytical solution in a
  Milne-Eddington atmosphere
• Marquardt algorithm to reach the minimum ?2
  (Harvey et al., 1972, Auer et al., 1977)
• ? Magneto-optical and damping effects (Landolfi
  Landi Degl'Innocenti, 1982)
• magnetic filling factor (Bommier et al.,
  2007)
• in the visible wavelength range, for solar
  surface typical field strengths,
• the magnetic filling factor ? and the magnetic
  field strength B effects cannot be separated in
  Stokes V
• only their product ?B (the "local average
  magnetic field strength") can be determined

UNNOFIT inversion accuracy from input test
values, noised at the THEMIS polarimetric
accuracy level 1.5x103
(input) ?B gt 45G NETWORK
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EXTRAPOLATIONS of THEMIS magnetic field maps
Potential field extrapolation (from
longitudinal magnetograms) 2002 ? Eibe et al.
(2002), Aulanier (2002, MDI magnetogram THEMIS
H?), Li et al. (2005), Li et al. (2006)
Linear force free field extrapolation (from
longitudinal magnetograms, often THEMIS inserted
in MDI) 2004 ? Berlicki et al. (2004),
Schmieder et al. (2006a,b), Schmieder et al.
(2007) Dudik et al. (2008) Non-linear force
free field extrapolation (from vector
magnetograms, needs the ambiguity solution) 2008
? Li et al. (2007, THEMIS longitudinal HUAIROU
vector), Canou et al. (stage M2 2008 2009,
submitted)
THEMIS pixel 0.5 arcsec up to 2007, 0.2 arcsec
since 2007 (new cameras)
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NLFFF EXTRAPOLATION Evidence of a Twisted Flux
Rope in a pre-eruptive structure
from Canou, A., Amari, T., Bommier, V.,
Schmieder, B., Aulanier , G., Li, H. 2009,
ApJL (submitted) (code XTRAPOL, Amari et al.,
2006)
AR 10808, THEMIS vector magnetic field map (with
solved ambiguity)
The Twisted Flux Rope (TFR)
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... et le pas de temps
courtesy T. Amari, thèse A. Canou (code
METEOSOL, Amari, 1996)
Eruption of the Twisted Flux Rope (TFR)
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échéance THEMIS le 25 mai 2009. Renouvellement
pas acquis Projet les codes sont prêts
passer à une phase d'exploitation développer
les observations et les extrapolations
systématiques en vue de roder le moteur de
prévision travail "en amont" de la prévision
proprement dite appel à idées pour la
structuration de ce projet