Astronomy and Astrophysics – Astronomy
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238..689g&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, May 15, 1989, p. 689-696.
Astronomy and Astrophysics
Astronomy
3
Counterflow, Herbig-Haro Objects, Molecular Flow, Neutron Stars, Stellar Coronas, Active Galaxies, Flow Velocity, Magnetic Flux, Pre-Main Sequence Stars
Scientific paper
A distinctive feature of the HH46/47 outflow field is the long straight 'jet-filament', which emerges from the globule encasing the stellar source to form a bridge between a number of discrete Herbig-Haro objects. The high-velocity flow detected along this filamentary channel excites patches of nebulosity, designated HH47BN, HH47A and HH47D, at roughly equal intervals along the track. Recent observations show an additional curved filament emerging from the globule and crossing the high-velocity flow at HH47BN. It is shown in this paper that the main features of the region, such as the geometries of the patches of nebulosity and their spacing, can be understood if the curved filament is a portion of a far more extensive helical structure which touches the straight channel at intervals. The similarly curved configuration of HH47C in the opposite hemisphere suggests that a related structure threads the counterflow. The role of magnetic fields threading these filaments is considered.
Cameron H. M. D.
Glencross William M.
Lightfoot John F.
Whitmore Bradley
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