Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263...57w&link_type=abstract
In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 57-60
Astronomy and Astrophysics
Astronomy
1
Flare Stars, Iue, Radio Astronomy, Emission Spectra, Stellar Radiation, Stellar Spectra
Scientific paper
The International Ultraviolet Explorer and the Very Large Array were used to simultaneously observe the dwarf M flare stars YZ Canis Minoris and AD Leonis and the RS CVn star λ Andromedae. Narrow-band, slowly varying radiation near 20 cm wavelength was detected from YZ Canis Minoris. This radiation cannot be attributed to conventional emission processes, but may be explained by a coherent emission mechanism. The Mg II h+k line intensities also underwent changes in intensity, although the connection between the microwave and ultraviolet variations is unclear. Impulsive microwave bursts were detected from AD Leonis, but there were no significant variations in the Mg II line intensities. Finally, enhancements in several ultraviolet emission lines were detected on timescales of about an hour from λ Andromedae without accompanying variations at 6 cm or 20 cm wavelength.
Lang Kenneth R.
Willson Robert F.
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