Optical observations of jets in the Seyfert nucleus NGC 4151

Abstract

18 spectra of the Seyfert nucleus NGC 4151 in the 4050–5000 Å spectral range from March 3 to April 11, 1986 and several high resolution spectra (3800–4900 Å) of March–May, 1987 are inferred from 6 -m telescope observations. When observed, the object was at a low -brightness level and did not exhibit photometric variability. The analysis of radial velocities of low-intensity features of the spectrum suggests that they should partly be the narrow satellites of Hp, H 8, H δ, H σ, and probably He II 4686 Å lines. The radial velocities of the satelites (−7500 km/s and 9400 km/s) are close, but not equal, to the velocities found by [10] for CIV 1550 Å. If the satellites are produced in jets, then the CIV lines are generated nearer to the nucleus center than the hydrogen lines and the nucleus mass is 10 8–10 9 M.