Ultraviolet and radio flares from UX ARIETIS and HR 1099

Details Ultraviolet and radio flares from UX ARIETIS and HR 1099 Ultraviolet and radio flares from UX ARIETIS and HR 1099

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...328..610l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 328, May 15, 1988, p. 610-616.

Astronomy and Astrophysics

Astronomy

12

Binary Stars, Radio Jets (Astronomy), Stellar Flares, Ultraviolet Radiation, Ultraviolet Spectra, Dwarf Stars, K Stars, Late Stars, Light Curve, Line Spectra

Scientific paper

Simultaneous observations of the RS CVn systems UX Ari and HR 1099 with the IUE satellite and the VLA are presented. Flaring activity is observed at ultraviolet wavelengths with the IUE when none is detected at radio wavelengths with the VLA. Radio flares with no detectable ultraviolet activity have also been observed. Thus, flares in the two spectral regions are either uncorrelated or weakly correlated. The flaring emission probably originates in different regions at the two wavelengths. Radio flares from RS CVn stars may originate in sources that are larger than, or comparable to, a star in size. This is in sharp contrast to compact, coherent radio flares from dwarf M stars. The ultraviolet flares from RS CVn stars probably originate in sources that are smaller than a component star.

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