EUV arcades - Signatures of filament instability

Details EUV arcades - Signatures of filament instability EUV arcades - Signatures of filament instability

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...81...91s&link_type=abstract

Solar Physics, vol. 81, Nov. 1982, p. 91-105. Research supported by the Observatoire de Paris;

Astronomy and Astrophysics

Astronomy

9

Coronal Loops, Extreme Ultraviolet Radiation, Solar Corona, Solar Magnetic Field, Solar Prominences, Stellar Structure, Filtergrams, Magnetic Field Configurations, Skylab Program, Spaceborne Astronomy, Stellar Models, Temperature Distribution

Scientific paper

The present investigation is based on the EUV observations from the HCO spectroheliometer aboard Skylab. These observations provide a great deal of information on coronal structures. The investigation is concerned with the EUV corona around active region filaments. One of its goals is to define the geometry and temperature distribution around those filaments which appear to be 'stable' (lifetimes equal to or greater than 2 days). The second goal is to study time changes in structures associated with other filaments which are 'unstable'. It is pointed out that the filaments and associated EUV loops reported in this investigation are not flare-related. The data of primary interest are those of Sept. 5, 1973, for which there exist simultaneous EUV and H-alpha filtergrams for the active region McMath 12510. It is found that active region filaments lie within channels of low emissivity in EUV lines formed above 1.5 x 10 to the 6th K.

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