New upper limit to the coronal line emission from the T Tauri star RU LUPI

Astronomy and Astrophysics – Astronomy

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Emission Spectra, Stellar Coronas, Stellar Spectra, T Tauri Stars, Flare Stars, Line Spectra, Solar Spectra, Stellar Luminosity

Scientific paper

A high dispersion AAT spectrogram sets an upper limit on the [Fe X] emission line λ6374.5 Å in the T Tauri star RU Lupi. The intensity of any 106 K corona in this star is less than 600 times that of the Sun compared to a chromosphere and transition region of 3 × 103 to 2 × 105 K gas 106 times stronger than the Sun's. The important theoretical implications are noted.

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