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An estimate of the solar background irradiance power spectrum.

Rabello-Soares, M. C.; Roca Cortes, T.; Jimenez, A. +2 more

Knowledge of the solar irradiance background is of great importance to solar and stellar physics. In particular, its contribution to the solar oscillations power spectrum is highly relevant as it represents the ultimate limit to the sensitivity of solar oscillations' observations. An analysis of the power spectra of the solar photometric data comi…

The EUV spectrum of κ Ceti: an active Sun.

Landini, M.; Del Zanna, G.; Landi, E.

The spectrum of κ Cet in the region 80-370Å observed by EUVE Spectrometers is analyzed to investigate the transition region and the corona of the star. The star appears to be in a rather quiet condition and no evidence exists of flare-like lines observed in many active stars. Several emission lines of moderately ionized iron (from Fe IX to Fe XVII…