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Ultraviolet spectrum of FU Ori and a ``Compromise'' model of the FUor

Errico, L.; Lamzin, S. A.; Kravtsova, A. S. +1 more

We have analyzed the Hubble Space Telescope spectrum of the young star FU Ori in the range 2300 3100 Å. The long-wavelength part of the spectrum is similar to the spectrum of a supergiant with T _eff ≃ 5000 6000 K, but the range of wavelengths shorter than ≃2600 Å is dominated by radiation from a region with T _eff ≃ 9000 K. We…