Dynamic phenomena on the RS Canum Venaticorum binary II Pegasi in August 1989. I. Observational data.
Bromage, G. E.; Doyle, J. G.; Linsky, J. L.; Mathioudakis, M.; Collier Cameron, A.; Kellett, B. J.; Neff, J. E.; Butler, C. J.; Byrne, P. B.; Marang, F.; Brown, A.; Sperauskas, J.; Olah, K.; Krzesinski, J.; van Wyk, F.; Avgoloupis, S.; Murphy, H. M.; Seiradakis, J. H.; Pajdosz, G.; Mavridis, L. N.; Fox, D.; Rovithis-Livaniou, H.; Rovithis, P.; Dadonas, V.; Antonomoulos, E.
United Kingdom, United States, Greece
Abstract
Observational results are given for two flares in Pi Pegasi that were detected by the GINGA and IUE satellites, as well as by ground-based Johnson U-band photometry and optical spectroscopy. The best-fitting results were obtained for a combination of a single-temperature plasma together with a power law; for a two-temperature model, the temperature of the second component was very high due to the tail in the photon distribution.