Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.233..791m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 233, Aug. 15, 1988, p. 791-800.
Astronomy and Astrophysics
Astronomy
43
Flow Velocity, Gas Flow, Ionized Gases, Line Shape, Orion Nebula, Stellar Mass, Balmer Series, Electron Density (Concentration), Infrared Sources (Astronomy), Kinetic Energy
Scientific paper
Observations of the [O III] 5007 Å line profiles from the compact ionized knot LV1 in the core of the Orion Nebula have revealed the presence of a tenuous flow of ionized gas emerging at receding speeds of up to 150 km s-1 from the vicinity of the knot. This larger flow appears to be the receding side of a "velocity ellipse" of ≅10 arcsec diameter. All of the ionized knots LV1-6 are associated with unresolved infrared sources which could indicate the presence of embedded stars, in which case the ionized high-speed outflows could be ejected during the formation of low-mass stars. In this case the Lyman photons from the nearby O6 star θ1C Ori would radiatively ionize the ejected gas. Alternatively it could be the wind from θ1C Ori which drives evaporated gas from the dense knot to form the extensive high-speed flow. Again all the gas would be radiatively ionized by θ1C.
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