Coordinated X-ray and ultraviolet observations of RU LUPI

Astronomy and Astrophysics – Astronomy

Scientific paper

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T Tauri Stars, Ultraviolet Spectra, Ultraviolet Spectroscopy, X Ray Sources, X Ray Spectra, Chromosphere, Helium, Iue, Spaceborne Astronomy, Stellar Spectra

Scientific paper

Within the framework of a large campaign of observations of RU Lupi in X-Ray, UV, Optical, and IR, the authors present partial results from X-ray and UV observations. A flux of 3×10-11erg/s was detected in the range 2 - 6 keV. Nothing was detected at higher energies. The UV spectrum of RU Lupi shows strong similarities with those of other T Tauri-type stars, with the exception of the presence of He II (λ1640 Å) emission line at a level of ≡6×10-14erg/cm2s. A general description of the UV spectrum is given together with some theoretical considerations on this object.

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