IUE observation of RS CVn-like binary Corona Borealis

Detection of the Neupert Effect in the Corona of an RS CVn Binary System by XMM-Newton and the VLA

The RS CVn-type binary σ Geminorum was observed during a large, longduration flare simultaneously with XMM-Newton and the VLA. The light curves show a characteristic time dependence that is compatible with the Neupert effect observed in solar flares: The time derivative of the X-ray light curve resembles the radio light curve. This observation can be interpreted in terms of a standard flare sce...

VLA multifrequency observations of RS CVn binaries

We present multiepoch Very Large Array (VLA) observations at 1.4 GHz, 4.9 GHz, 8.5 GHz and 14.9 GHz for a sample of eight RS CVn binary systems. Circular polarization measurements of these systems are also reported. Most of the fluxes observed are consistent with incoherent emission from mildly relativistic electrons. Several systems show an increase of the degree of circular polarization with ...

Musicos 1998: Optical and X-rays Observations of Flares on the Rs Cvn Binary Hr 1099

We present simultaneous and continuous observations of Hα, Hβ, Na i D1, D2 and He i D3 lines of the chromospherically active binary HR 1099. We have observed HR 1099 for more than 3 weeks almost continuously and monitored two flares. An increase in Hα, Ca ii H & K, Hβ, Hei D3 and Hei λ6678 and a strong filling-in of the Nai D1, D2 and Mgi b triplet during one of the flares are observed. We have...

Quiescent and Flaring Structure in Rs Cvn

Magnetic Activities in Outer Atmosphere of the RS CVn-type Binary SZ Psc

Abstract. We present the results of time-resolved high-resolution spectroscopic observations of the very active RS CVn-type star SZ Psc, obtained during two consecutive observing nights in 2011 October. Chromospheric activity indicators (including the Hα, Na i D1, D2, He i D3, and Hβ lines) formed at different atmospheric heights were analyzed using the spectral subtraction technique, which sho...