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

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

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...370..273g&link_type=abstract

Astronomy and Astrophysics, v.370, p.273-280 (2001)

Astronomy and Astrophysics

Astrophysics

5

Sun: Chromosphere, Transition Region

Scientific paper

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.

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