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Variability of the H_alpha and Na I D Line Profiles in the Spectrum of FU Ori
Errico, L.; Lamzin, S. A.; Vittone, A.
The variations of line profiles in the spectrum of FU Ori during several consecutive nights, from January 3 through January 8, 1999, have been traced for the first time in the entire history of studying this star. The variations of the H_alpha and Na I D line profiles are regular in pattern; at each time, the profiles of these lines were similar t…
Peculiarities of the UV Continuum Energy Distribution for T Tauri Stars
Lamzin, S. A.; Kravtsova, A. S.
In the UV spectra of BP Tau, GW Ori, T Tau, and RY Tau obtained with the Hubble Space Telescope, we detected an inflection near 2000 Angstrems in the F^clambda(lambda) curve that describes the continuum energy distribution. The inflection probably stems from the fact that the UV continuum in these stars consists of two components: the e…