Long-slit spectroscopy and direct imaging of the PMS objects GGD 33 and V 350 Cephei in NGC 7129

Astronomy and Astrophysics – Astrophysics

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Herbig-Haro Objects, Reflection Nebulae, Star Formation, Stellar Mass Ejection, T Tauri Stars, Astronomical Spectroscopy, Emission Spectra, Line Spectra, Silicon

Scientific paper

We present CCD images and long-slit spectra of the nebulous object GGD 33 and of the T Tauri star V 350 Cep in the star formation region NGC 7129. The data suggest that GGD 33a is a T Tauri star and likely the illuminating source of the whole GGD 33. Evidence of variablility of GGD 33a is presented. Double-peaked (S II) emission lines are observed in GGD 33a. The high-velocity component of the (S II) emission could be related to a Herbig-Haro (HH) jet-like outflow observed very close to the star. V 350 Cep is embedded in a reflection nebulosity. High velocity mass outflow, detected through its blueshifted H-alpha emission, seems to emanate from V 350 Cep. The spectrum of V 350 Cep presents a large number of permitted emission lines, but, except (S II), no forbidden emission lines have been identified in our spectra.

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