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Session 5 -- Chromospheres/Coronae/Active Binaries

Display presentation, Monday, 30, 1994, 9:20-6:30

[5.17] EUVE Coronal Spectroscopy of the RS CVn Binaries $\sigma^{2}$ CrB and II Peg

We have used the Extreme Ultraviolet Explorer satellite to study the coronal emission from the EUV-bright RS CVn binaries $\sigma^{2}$ CrB, observed 1994 Feb 16-21, and II Peg, observed 1993 Oct 1-5. We present time-resolved and integrated EUV short, medium and long wavelength spectra for these binaries. $\sigma^{2}$ CrB shows significant first-order emission features in the long wavelength region. The coronal emission measure distributions and electron densities are estimated for these active coronae dominated by high temperature ($\geq$ 10$^{7}$ K) plasma.

This work is supported by NASA Grants NAG5-2259 \& NAGW-2904 to the University of Colorado.

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