Strong radio flaring period in UXArietis

Details Strong radio flaring period in UXArietis Strong radio flaring period in UXArietis

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...330.1060t&link_type=abstract

Astronomy and Astrophysics, v.330, p.1060-1066 (1998)

Astronomy and Astrophysics

Astrophysics

14

Binaries: Close, Stars: Coronae, Stars: Flare, Stars: Individual: Uxari, Radio Continuum: Stars

Scientific paper

In January 1993 we observed the RSCVn-type binary system UX Ari at 6cm using the 32m radiotelescope of Noto, with a temporal coverage of about 12 hours per day. The source was found to be in a very active period, with a continuous series of radio flares of flux densities up to 350mJy. The analysis of the data shows that the radio emission consists of two different components: a continuous series of strong radio flares and an orbital phase dependent component, with a minimum of emission around phase Phi =0.5. The amplitude of the radio flares and their time of occurrence do not depend on the orbital phase, suggesting that the region where they originate is always visible from Earth. A bright and stable active region, localized in the hemisphere of the K star not visible from the G star, seems to account for the orbital phase dependence of the radio emission.

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