Flare variability in the close binary FL Vir |
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| Authors: | B R Pettersen |
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| Institution: | Department of Mathematical Sciences and Technology, University of Environmental and Life Sciences, PO Box 5003, N-1432 Ås, Norway |
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| Abstract: | The results of U -filter flare monitoring of the binary flare star FL Vir = Wolf 424 is presented. 57 flares with energies between 2 × 1028 and 2 × 1031 erg were recorded in 20 h of observation. The properties of flare occurrence and flare time-scales are analysed, and the flare activity level in 1980 April is determined to be L f( U ) = 8.0 × 1026 erg s?1 . This is larger than previously published results and may indicate a variation in the flare activity level on a time-scale of years. An analysis of existing data indicates that the flare activity level correlates with the relative orbital positions of the stars. |
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| Keywords: | techniques: photometric binaries: close stars: flare |
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