Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsh21b..07k&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SH21B-07
Astronomy and Astrophysics
Astrophysics
7500 Solar Physics, Astrophysics, And Astronomy, 7509 Corona, 7513 Coronal Mass Ejections, 7524 Magnetic Fields, 7549 Ultraviolet Emissions
Scientific paper
On January 8, 2002 following a CME at the east limb, thin threads of materials are formed, as seen in the white light corona, with continuous outflow that lasted more than two days as it gradually moved toward the north. We interprete it as a current sheet left behind the CME. UV/EUV spectra were taken on January 10 by SOHO/UVCS and SOHO/CDS as part of the SOHO JOP 151. The UV spectra at 1.6 Ro show a small region (< 70 arcsec) of depleted low temperature emission and a high temperature region where lines from highly ionized ions such as Fe+17 and Ca+13 are observed. We combine the data from UVCS, LASCO, EIT and CDS on SOHO to derive the physical properties (electron temperature, electron density and elemental abundances) and dynamical properties (outflow speed and acceleration) of these regions which is likely to be associated with this current sheet. Implications on its formation and magnetic properties are discussed.
Fludra Andrzej
Ko Yumi
Lawrence Gareth
Li Jiying
Lin Juhn-Jong
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