Issue |
A&A
Volume 424, Number 3, September IV 2004
|
|
---|---|---|
Page(s) | 1039 - 1048 | |
Section | The Sun | |
DOI | https://doi.org/10.1051/0004-6361:20040083 | |
Published online | 06 September 2004 |
Shock wave driven by an expanding system of loops
1
Max-Planck-Institut für Sonnensystemforschung (Previously known as Max-Planck-Institut für Aeronomie.) , Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany e-mail: raouafi@linmpi.mpg.de
2
Instituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Torino, 10025 Pino Torinese, Italy
3
NASA/CUA (The Catholic University of America), Goddard Space Flight Center, Greenbelt, MD 20771, USA
4
Institut d'Astrophysique Spatiale, Université Paris XI, 91405 Orsay Cedex, France
Received:
15
January
2004
Accepted:
25
May
2004
We report on a Coronal Mass Ejection (CME) observed on June 27, 1999 by the UltraViolet
Coronagraph Spectrometer (UVCS) telescope operating on board the SOHO spacecraft. The CME was also
observed by the Large Angle Spectroscopic Coronagraph (LASCO). Emission of hot material has been
recorded by UVCS propagating in front of an opening system of loops generated by the CME. The
evolution of the UVCS structure is highly correlated with the evolution of the opening loop. The data
reveal excess broadening of the doublet lines and an enhancement in the intensity of
the
and
lines due to the motion of the expanding hot
gas. The hot gas emission seems to be due to a shock wave propagating in front of a very fast gas
bubble traveling along the opening loop system.
Key words: plasmas / Sun: coronal mass ejections (CMEs) / Sun: flares / Sun: corona / Sun: UV radiation / shock waves
© ESO, 2004
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