Solar arch filaments observed with THEMIS

Details Solar arch filaments observed with THEMIS Solar arch filaments observed with THEMIS

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...355.1146m&link_type=abstract

Astronomy and Astrophysics, v.355, p.1146-1151 (2000)

Astronomy and Astrophysics

Astrophysics

8

Sun: Chromosphere, Sun: Filaments, Line: Profiles

Scientific paper

Arch Filaments (AF) have been observed in the Ca Ii 8542 Å line with the THEMIS telescope in September 1998. We present a preliminary analysis of MSDP spectro-imaging data. A cloud-model fit provides line-of-sight velocities and a set of plausible values for the model parameters. The high sensitivity of the filament opacity to temperature, coupled with the rough linearity versus electronic density, shows that this Ca Ii line should be very efficient to complement usual Hα data for a more rigorous diagnostics. Based on observations made with the THEMIS telescope operated on the island of Tenerife by CNRS-CNR in the spanish Observatorio del Teide of the Instituto de Astrofisica de Canarias

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