Polar surges and macrospicules II. Dynamics of an eruptive event from off-limb observations

Citation
Aa. Georgakilas et al., Polar surges and macrospicules II. Dynamics of an eruptive event from off-limb observations, ASTRON ASTR, 370(1), 2001, pp. 273-280
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
0004-6361 → ACNP
Volume
370
Issue
1
Year of publication
2001
Pages
273 - 280
Database
ISI
SICI code
0004-6361(200104)370:1<273:PSAMID>2.0.ZU;2-V
Abstract
We continue our study of polar surges and macrospicules at the period of so lar minimum, analyzing high resolution multiwavelength limb observations th at provide a clearer picture of the dynamical phenomena occurring well abov e the chromosphere of a polar sap. The time sequence of an erupting and imp ulsive polar event is examined from the low chromosphere to coronal heights , deriving both proper motions and Doppler velocities. Our observations sug gest that there is a close association of polar surges with explosive event s, supporting the hypothesis that magnetic reconnection triggered by emergi ng flux provides the accelerative mechanism for this polar region event.