Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...213..402s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 213, no. 1-2, April 1989, p. 402-410. Research supported by the Observatoire d
Astronomy and Astrophysics
Astrophysics
13
Carbon, H Alpha Line, Solar Magnetic Field, Solar Prominences, Sunspots, Chromosphere, Field Strength, Force-Free Magnetic Fields, Solar Corona, Velocity Distribution
Scientific paper
H-alpha (MSDP), magnetograph (Meudon), and C IV (HRTS) observations are used to investigate the relationship between the dynamics of a solar filament and a spot region with vortex structure. Comparisons are made between the structures in H-alpha and C IV intensity and Doppler-shift images. These show filament shearing and a good correlation between H-alpha and C IV upflow, the C IV filament being very dynamic (+ or - 50 km/s). Magnetograph data for the whole region including the sunspot are used to calculate linear force-free fields. The magnetic structure at the filament is found to be favorable for support.
Démoulin Pascal
Dere Ken P.
Raadu Michael A.
Schmiedler B.
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