Ammonia toroid aligned perpendicular to the HH 1 and HH 2 bipolar outflow. [Herbig-Haro objects]

Journal Article · Mon Jul 01 04:00:00 EDT 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/184521· OSTI ID:5681154

Torrelles, J M; Canto, J; Rodriguez, L F; Ho, P T.P.; Moran, J M

The ammonia emission from the region containing the Herbig-Haro objects 1 and 2, which mark the presence of a bipolar outflow, was mapped. The ammonia observations delineate an elongated structure aligned perpendicular to the bipolar outflow. This ammonia condensation is centered between HH 1 and HH 2 and coincides with the recently discovered central radio continuum source. This continuum source has no optical counterpart. The ammonia spectrum at the position of the continuum source shows a remarkable splitting. Based on the orientation of the bipolar outflow, which is known to be oriented nearly perpendicular to the line of sight, and on theoretical considerations, it is concluded that the ammonia source is part of a toroid, viewed edge-on, in slow expansion driven by the wind pressure of the central source. This toroid may be the focusing mechanism for the bipolar outflow. Searches for ammonia condensations in the vicinity of other HH objects may help localize the energy sources of these systems. 26 references.

• Research Organization: Harvard-Smithsonian Center for Astrophysics, Cambridge, MA; Universidad Nacional Autonoma de Mexico, Mexico City
• OSTI ID: 5681154
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 294; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMMONIA
COSMIC GASES
COSMIC RADIO SOURCES
EMISSION SPECTRA
FLUIDS
GASES
HYDRIDES
HYDROGEN COMPOUNDS
INTERSTELLAR SPACE
NEBULAE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
SPACE
SPECTRA