Volume 370, Number 1, April IV 2001
|Page(s)||273 - 280|
|Section||Planets and planetary systems|
|Published online||15 April 2001|
Polar surges and macrospicules
II. Dynamics of an eruptive event from off-limb observations
Solar Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
2 Institut d'Astrophysique de Paris, CNRS, 98bis boulevard Arago, 75014 Paris, France e-mail: firstname.lastname@example.org
3 Electronics Laboratory, University of Patras, Patras 26110, Greece e-mail: email@example.com
Corresponding author: A. A. Georgakilas, firstname.lastname@example.org
Accepted: 23 January 2001
We continue our study of polar surges and macrospicules at the period of solar minimum, analyzing high resolution multiwavelength limb observations that provide a clearer picture of the dynamical phenomena occurring well above the chromosphere of a polar cap. The time sequence of an erupting and impulsive polar event is examined from the low chromosphere to coronal heights, deriving both proper motions and Doppler velocities. Our observations suggest that there is a close association of polar surges with explosive events, supporting the hypothesis that magnetic reconnection triggered by emerging flux provides the accelerative mechanism for this polar region event.
Key words: Sun: chromosphere, transition region
© ESO, 2001
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