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Radio emission from stellar active regions

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Radiophysics and Quantum Electronics Aims and scope

Abstract

Several types of stars present a variable radio emission. In this paper we present a time-dependent model aimed to reproduce the RS CVn emission, which however can be easily extended to other types of stars. The time evolution of a population of electrons following an initial power-law distribution is studied. It is shown that the spectrum of the emitted radiation evolves, in a time scale of a few days, from the typical spectrum of the flaring emission to the flat one observed in quiescent periods. It is also shown that the intensity distribution reproduces the core-halo structure observed using VLBI for a period of about one day after the flare.

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Authors
  1. E. Franciosini
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  2. F. Chiuderi Drago
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Additional information

Department of Astronomy and Space Science, University of Florence, Italy. Published in Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 37, No. 5, pp. 634–643, May, 1994.

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Franciosini, E., Drago, F.C. Radio emission from stellar active regions. Radiophys Quantum Electron 37, 403–409 (1994). https://doi.org/10.1007/BF01045690

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  • DOI: https://doi.org/10.1007/BF01045690

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