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Prominence-cavity regions observed in 2010 eclipse flash spectra and SWAP images

Published online by Cambridge University Press:  27 June 2012

M. Faurobert ,
C. Fang ,
T. Corbard ,
C. Bazin ,
S. Koutchmy  and
E. Tavabi
C. Bazin
Affiliation:
Institut d’Astrophysique de Paris, UMR 7095, CNRS and UPMC, France. e-mail: [email protected]
S. Koutchmy
Affiliation:
Institut d’Astrophysique de Paris, UMR 7095, CNRS and UPMC, France. e-mail: [email protected]
E. Tavabi
Affiliation:
Payame Noor University, Zanjan, Iran
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Abstract

Images from the SWAP (Proba 2 mission) taken in the Fe IX/X coronal line emission are compared to simultaneous slitless flash spectra taken during the total solar eclipse of July, 11th 2010. Many faint low excitation emission lines together with the HeI and the HeII Paschen α (Pα) chromospheric lines are recorded in the regions of limb prominences observed in space. We consider a deep flash spectrum obtained by summing 80 individual spectra to show the intensity modulations of the continuum between HeI and HeII lines. Intensity depressions are observed around the prominences in both eclipse and SWAP images. The prominence cavities are interpreted as a relative depression of plasma density produced inside the corona surrounding the prominences, and some evidence of intense heating occuring in the region around the prominence is discussed.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 55: 4th French-Chinese Meeting on Solar Physics - Understanding Solar Activity: Advances and Challenges , 2012 , pp. 185 - 187
Copyright
© EAS, EDP Sciences 2012

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References

Bazin, C., Koutchmy, S. , & Tavabi, E., 2012, Solar Phys., under review
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