Spectra of PV Cep and GM1-29 (RNO 125) in 1976-1997

The main spectral characteristics of PV Cep, a T Tau star, and of the variable nebula GM1-29 associated with it are considered. Their variations during 1976-1997, based on observations on the 6-m telescope and literature data, are described. In the period of maximum brightness (1977-1979), the star had a well-developed emission spectrum, typical of classical T Tau stars, with clearly defined P Cyg components in the H and H lines, strong Na D absorption features shifted in the blue direction, and well-defined fluorescence in Fe I emission features. After the end of the latter eruption, the star's spectrum has remained more or less in a stable state; emission lines are considerably weaker. The ejected matter continues to be observed in the form of shifted components in emission lines. There are also indications of the possible existence of a collimated jet 1.5-2 long in the star's immediate vicinity. Also clearly seen is HH215 P1 — the first HH knot in the giant jet emerging from PV Cep. At the epoch of the object's maximum brightness, there were clear signs of spectral asymmetry of the stellar envelope in the nebula's spectrum, due to the directional outflow, manifested in variation of the profiles and intensities of Balmer lines. PV Cep and GM1-29 thereby prove to be another object in which the phenomenon first noted in R Mon and NGC 2261 is observed.