A new Herbig-Haro object in the GUM nebula and its associated star

Astronomy and Astrophysics – Astronomy

Scientific paper

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Herbig-Haro Objects, Nebulae, Star Formation, Charge Coupled Devices, Infrared Astronomy Satellite, Molecular Clouds, Stellar Luminosity, Stellar Spectra

Scientific paper

Photographic and spectroscopic observations are presented of some faint nebulosity which is associated with the strong IRAS point source 08211 - 4158. Two components are observed. One relatively compact and knotty region has a purely gaseous spectrum characteristic of a low-excitation Herbig-Haro object, while another area shows a spectrum with strong continuum radiation and superposed emission lines which suggest that it is scattering light from an embedded young star. Radial-velocity measurements show that this star is at rest with respect to its surroundings while the Herbig-Haro object has a mean velocity of -38 km/s with respect to its local standard of rest. The evidence favors but does not conclusively show that the source 1 in the area, identified by Campbell and Persson (1988), marks the position of the embedded star which powers the Herbig-Haro object.

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