Merging of Filaments in a Dual-Filament System

Details Merging of Filaments in a Dual-Filament System Merging of Filaments in a Dual-Filament System

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...3e..92m&link_type=abstract

Solar Active Regions and 3D Magnetic Structure, 26th meeting of the IAU, Joint Discussion 3, 16-17 August, 2006, Prague, Czech R

Computer Science

Scientific paper

Introduction: The dual filament system merges to form one extended filament. Methods: The filaments were observed at Helio Research at multiple wavelengths around Hα using a tunable filter and a narrow band Fabry-Perot etalon as part of the Joint Observing Campaign (JOP 178). These observations are used to create two-dimensional Dopplergrams. The Hα images are compared with data taken onboard the SOHO (Solar and Heliospheric Observatory) spacecraft (EIT at 304 A and LASCO C2). The GONG magnetograms provide the information on photospheric magnetic fields. Results and Discussion: The filaments were observed on the solar disk between October 10 and 16, 2004. We compare the morphology of the filament system in Hα and He II line at 304 A and discuss its evolution. We investigate the photospheric magnetic flux cancellation rate during the merging process. There is no clear evidence of an eruption associated with the merging of the filaments from either EIT or LASCO in contrary to some previous findings.

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