Flux tube emergence, from photosphere to corona

Details Flux tube emergence, from photosphere to corona Flux tube emergence, from photosphere to corona

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf..103p&link_type=abstract

SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret

Astronomy and Astrophysics

Astrophysics

Scientific paper

From a campaign of multi-wavelength observations of an emerging active region, we have studied the dynamics of the solar atmosphere due to this emergence and the magnetic field topology of the active region. In addition with the observations obtained with Yohkoh, SOHO and TRACE, a balloon borne 80 cm telescope (Flare Genesis Experiment) provided us a series of high spatial resolution vector magnetograms. For the first time we highlight that magnetic flux tubes do not directly emerge with a large Omega-loop shape, as suggest the TRACE observations of the corona, but rather within an undulatory shape. We demonstrated that the resistive Parker instability allows the flux tube to go through the low atmosphere.
This result has been obtained by performing an extrapolation of the field above the active region.

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