Coronal lines and structure of the upper atmospheres of T Tauri stars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Line Spectra, Stellar Atmospheres, Stellar Coronas, Stellar Spectra, T Tauri Stars, Conductive Heat Transfer, Emission Spectra, Temperature Dependence, Ultraviolet Spectra, X Ray Spectra

Scientific paper

Relations are obtained making it possible to determine the parameters of stellar coronas from the emission intensities in the strongest forbidden coronal lines. A joint analysis is made of observations in the UV and X-ray ranges and the results of a search for coronal lines for T Tau stars. It is shown that heat conduction plays an insignificant role in the energy balance in the atmospheres of these stars at temperatures greater than about 200,000 K. The prospects of the search for coronal lines in the spectra of T Tau stars are discussed.

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