ISSN:
1572-946X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The chromospherically-active binary, V711 Tau, had been observed by using the American Very Large Array (VLA) at five bands from 1.4 to 15 GHz. During the observation, the source was undergoing an intense flare, its radio luminosity up to 1.8 × 1018 erg s−1 Hz−1. The degree of circular polarization in the phase of the most intense flare was very small. With the decaying of the flare the flux density decreased, spectral index became smaller, spectra steeper and reversal frequency lower; the degree of circular polarization increased and its direction was dependent on frequency. These observational facts support the conclusion that the emission during intense flare is synchrotron (or synchro-cyclotron) mechanism. The magnetic intensity is about 10 G nearτ = 1, the average electron energy, 4 MeV, the electron density with larger than 10 keV, 3 × 104−9 × 104 cm−3 and the electronic energy spectrum index in power-law distribution 1.3.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00627132
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