THE FU ORIONIS TYPE SPECTRUM AND BIPOLAR OUTFLOW OF PARSAMYAN-21

We present CCD images in the red and long-slit spectrograms of the young cometary nebula Parsamyan 21. The spectroscopic and far-infrared properties of its illuminating source are characteristic for an FU Orionis star. The spectrum is of type F5Iab with broad absorption lines and a broad, blueshifted P Cygni profile of Halpha, reaching a velocity of -600 km s-1 at the blue edge of its absorption component. The star coincides with a cold IRAS source and is associated with a short bipolar Herbig-Haro outflow oriented along the axis of symmetry of the cometary nebula. The image of the central source is nonstellar (FWHM = 1.20") due to scattering by circumstellar dust.