Periodicities of Radio Flares in RS CVn and Algol Binaries

Details Periodicities of Radio Flares in RS CVn and Algol Binaries Periodicities of Radio Flares in RS CVn and Algol Binaries

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..219..181r&link_type=abstract

Stars as suns : activity, evolution and planets, Proceedings of the 219th symposium of the International Astronomical Union held

Astronomy and Astrophysics

Astronomy

Scientific paper

Periodicities of radio flaring activity from the Algol systems beta Per and delta Lib and the RS CVn systems V711 Tau and UX Ari were determined from a continuous 5-year survey. The radio continuum fluxes at 2.3 GHz and 8.3 GHz were monitored with the NRAO--Green Bank Interferometer for 2096 days from 1995 January to 2000 October. The maximum detected flare strengths at 8.3 GHz were 1.17 Jy for beta Per 0.034 Jy for delta Lib 1.44 Jy for V711 Tau and 0.82 Jy for UX Ari. Power Spectrum Analysis and Phase Dispersion Minimization were used to determine the periodicity of flaring activity in each binary. The strongest periodicities found were 48.9 days for beta Per 120.7 days for V711 Tau and 141.4 days for UX Ari. No significant periodicities were found for delta Lib. The continuous survey has demonstrated that there are active and quiescent flaring cycles in V711 Tau and beta Per.

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