Abstracts > Abstract list by author > Bazin Cyrille

Tuesday 11
Session I-1.4 Filament Environment
Chairman: YiHua Yan
› 17:45 - 18:00 (15min)
Observation of the Prominence Cavity Regions using slitless Eclipse Flash Spectra and Spaceborn filtergrams
Cyrille Bazin  1, 2, *@  , Serge Koutchmy  2@  , Philippe Lamy  1@  
1 : Laboratoire d'Astrophysique de Marseille  (LAM)  -  Website
INSU, CNRS : UMR6110, Université de Provence - Aix-Marseille I
Pôle de l'Étoile Site de Château-Gombert 38, rue Frédéric Joliot-Curie 13388 Marseille cedex 13 -  France
2 : Institut d'Astrophysique de Paris  (IAP)  -  Website
Université Pierre et Marie Curie - Paris VI, INSU, CNRS : UMR7095
98bis, bd Arago - 75014 Paris France -  France
* : Corresponding author

During the total solar eclipse of 11 July 2010, slitless flash spectra were obtained
simultaneously with SWAP/Proba2 174 and AIA/SDO 171, 193, 304 and 131 images.
The optically thin neutral Helium at 4713 A and singly ionized Helium 4686 A Paschen alpha lines are identified on eclipse (15 frames/seconde cadence) spectra where regions of limb prominences are obtained with space-borne imagers.

We summed 80 individual spectra to perform a 2D mapping of the ratio I (He I 4713) / I (He II 4686) and demonstrate a rising of the average temperature at the edge of the prominence. We also evaluate for the first time the continuum modulations in spectra with photometric accuracy. Intensity deficits are observed near the prominence boundaries in both eclipse spectra and in EUV images, confirming that the prominence cavity regions are characterized by some relative depression of plasma density in the surrounding corona.
The enhanced heating occurring in these regions is also discussed.


Online user: 1 RSS Feed