Observations of Filaments

Details Observations of Filaments Observations of Filaments

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.7905t&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #79.05; Bulletin of the American Astronomical Society, Vol. 31, p.963

Astronomy and Astrophysics

Astronomy

Scientific paper

Filaments are clearly seen as absorption features in the TRACE FE IX and XII images. Because of the 24 hour coverage of TRACE many filaments have been observed on the disk and near the limb, and as quiescent and active structures. A quiescent filament consists of many parallel strands the run nearly parallel to the surface. The strands are often at the TRACE resolution and are always in motion. Adjacent strands often exhibit flows in opposite directions with speeds of 10 to 40 km/second. Filaments occasionally erupt explosive from the surface. The initial accelerations have not been observed with a 30 second cadence. Velocities in the initial phase range between 200 and 400 km/s. Filaments are observed to erupt and travel out of the TRACE field of view, erupt and fall back to the solar surface, and erupt and travel a short distance before being constraint by overlying fields. Examples of the dynamic structure of filaments and their modes of eruption will be demonstrated in a video presentation.

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