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2000AJ....119.2919B - Astron. J., 119, 2919-2959 (2000/June-0)
Disks, microjets, windblown bubbles, and outflows in the Orion nebula.
BALLY J., O'DELL C.R. and McCAUGHREAN M.J.
Abstract (from CDS):
The new data are combined with older HST images to determine proper motions for many nebular features. Neither the LL Ori type bow shocks in the outskirts of the nebula nor the Hα + [O III] arcs that surround many proplyds near the Trapezium show measurable proper motions and are therefore stationary structures. However, most other bow-shaped features not centered on young stars exhibit large proper motions, with velocities ranging from 50 to 300 km.s–1. The sources of many of these moving features remain unknown. The proper-motion survey of the nebular core reveals the presence of about a dozen new large-scale (>0.1 pc) outflow complexes. Many of these new outflows originate from the vicinity of the high-luminosity OMC-1S infrared and submillimeter source complex located southwest of the Trapezium. These supersonic features provide evidence that stellar outflows inject large amounts of kinetic energy into the nebula. However, a quantitative analysis indicates that their total power is small compared with the power in the plasma flowing away from the main nebular ionization front.
Abstract Copyright: ∼
Journal keyword(s): ISM: Individual: Name: Orion Nebula - ISM: Jets and Outflows - Stars: Formation - Stars: Pre-Main-Sequence - Stars: Winds, Outflows
Nomenclature: HH NNN (Nos 508-530). Tables 1, 2: [BOM2000] dSSs-MSS, [BOM2000] dSSs-MMSS, N=15+33. Table 3: [BOM2000] jSSs-MSS N=23. Table 4: [BOM2000] wSSs-MSS N=10, [BOM2000] LL Ori WNa (Nos N1-N3, S1-S3, N2a-N2b).
Simbad objects: 108