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Periodicities of Radio Flares in RS CVn and Algol Binaries

Published online by Cambridge University Press:  26 May 2016

Mercedes T. Richards ,
Elizabeth B. Waltman ,
Frank D. Ghigo  and
Donald St. P. Richards
Mercedes T. Richards
Affiliation:
Penn State University, Department of Astronomy & Astrophysics, 525 Davey Lab, University Park, PA 16802, USA
Elizabeth B. Waltman
Affiliation:
Naval Research Laboratory, Code 7214, 4555 Overlook Ave. S. W., Washington, D.C. 20375, USA
Frank D. Ghigo
Affiliation:
National Radio Astronomy Obs., P.O. Box 2, Green Bank, WV 24944
Donald St. P. Richards
Affiliation:
Penn State University, Department of Statistics, 326 Thomas Building, University Park, PA 16802, USA

Abstract

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Periodicities of radio flaring activity from the Algol systems β Per and δ 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 β Per, 0.034 Jy for δ 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 β Per, 120.7 days for V711 Tau, and 141.4 days for UX Ari. No significant periodicities were found for δ Lib. The continuous survey has demonstrated that there are active and quiescent flaring cycles in V711 Tau and β Per.

Type
Part 4: High Energy Phenomena in Sun and Stars
Information
Symposium - International Astronomical Union , Volume 219: Stars as Suns : Activity, Evolution and Planets , 2004 , pp. 181 - 186
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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