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

Abstract

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 -1 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 & Persson 1988, marks the position of the embedded star which powers the Herbig-Haro object.

Probing the origin of 4FGL J0822.8-4207: cosmic ray illumination from the SNR Puppis A and the Herbig-Haro object HH219

“…A protostellar jet known as HH219 is found at a location consistent with the positional uncertainty region of the GeV source (Graham 1991), and it is found approximately at the coordinates (J2000) RA= 08 h 22 m 54 s , Dec= −42 • 08 47 (RA= 125.725 • , Dec= −42.146 • ). The ejection processes resulting from the formation of massive stars can produce jets whose termination shocks and ambient conditions could accelerate particles to very high energies (Araudo et al 2007;Bosch-Ramon et al 2010).…”

“…As mentioned earlier, a Herbig-Haro object (HH219) in the complex IRAS 08211-4158 is known to exist at the location of the GeV source 4FGL J0822.8-4207 (Graham 1991). Detailed observations of the jet, which is associated with the youngest and most massive object in the cluster, a very young B2 spectral type star of 642L and 5−6 M (Caratti o Garatti et al 2004), were carried out by Lorenzetti et al (2002) andCaratti o Garatti et al (2004).…”